• # python基础数据类型

时间：2017-03-18 18:45:28      阅读：4080      评论：0      收藏：0      [点我收藏+]
原文：http://www.cnblogs.com/waylon/p/6575000.html

## 运算符

### 1、算数运算 2、比较运算： 3、赋值运算： 4、逻辑运算： 5、成员运算： ## 基础数据类型

### 1、整型，int

在32位机器上，整数的位数为32位，取值范围为-2**31～2**31-1，即-2147483648～2147483647
在64位系统上，整数的位数为64位，取值范围为-2**63～2**63-1，即-9223372036854775808～9223372036854775807

eg:

a.
ni = 123
n2 = 456
print( n1 + n2)

b.
获取二进制的最短位数
n1 = 4
ret = n1.bit_length()
print(ret)  ```class int(object):
"""
int(x=0) -> int or long
int(x, base=10) -> int or long

Convert a number or string to an integer, or return 0 if no arguments
are given.  If x is floating point, the conversion truncates towards zero.
If x is outside the integer range, the function returns a long instead.

If x is not a number or if base is given, then x must be a string or
Unicode object representing an integer literal in the given base.  The
literal can be preceded by ‘+‘ or ‘-‘ and be surrounded by whitespace.
The base defaults to 10.  Valid bases are 0 and 2-36.  Base 0 means to
interpret the base from the string as an integer literal.
>>> int(‘0b100‘, base=0)
"""
def bit_length(self):
""" 返回表示该数字的时占用的最少位数 """
"""
int.bit_length() -> int

Number of bits necessary to represent self in binary.
>>> bin(37)
‘0b100101‘
>>> (37).bit_length()
"""
return 0

def conjugate(self, *args, **kwargs): # real signature unknown
""" 返回该复数的共轭复数 """
""" Returns self, the complex conjugate of any int. """
pass

def __abs__(self):
""" 返回绝对值 """
""" x.__abs__() <==> abs(x) """
pass

""" x.__add__(y) <==> x+y """
pass

def __and__(self, y):
""" x.__and__(y) <==> x&y """
pass

def __cmp__(self, y):
""" 比较两个数大小 """
""" x.__cmp__(y) <==> cmp(x,y) """
pass

def __coerce__(self, y):
""" 强制生成一个元组 """
""" x.__coerce__(y) <==> coerce(x, y) """
pass

def __divmod__(self, y):
""" 相除，得到商和余数组成的元组 """
""" x.__divmod__(y) <==> divmod(x, y) """
pass

def __div__(self, y):
""" x.__div__(y) <==> x/y """
pass

def __float__(self):
""" 转换为浮点类型 """
""" x.__float__() <==> float(x) """
pass

def __floordiv__(self, y):
""" x.__floordiv__(y) <==> x//y """
pass

def __format__(self, *args, **kwargs): # real signature unknown
pass

def __getattribute__(self, name):
""" x.__getattribute__(‘name‘) <==> x.name """
pass

def __getnewargs__(self, *args, **kwargs): # real signature unknown
""" 内部调用 __new__方法或创建对象时传入参数使用 """
pass

def __hash__(self):
"""如果对象object为哈希表类型，返回对象object的哈希值。哈希值为整数。在字典查找中，哈希值用于快速比较字典的键。两个数值如果相等，则哈希值也相等。"""
""" x.__hash__() <==> hash(x) """
pass

def __hex__(self):
""" 返回当前数的 十六进制 表示 """
""" x.__hex__() <==> hex(x) """
pass

def __index__(self):
""" 用于切片，数字无意义 """
""" x[y:z] <==> x[y.__index__():z.__index__()] """
pass

def __init__(self, x, base=10): # known special case of int.__init__
""" 构造方法，执行 x = 123 或 x = int(10) 时，自动调用，暂时忽略 """
"""
int(x=0) -> int or long
int(x, base=10) -> int or long

Convert a number or string to an integer, or return 0 if no arguments
are given.  If x is floating point, the conversion truncates towards zero.
If x is outside the integer range, the function returns a long instead.

If x is not a number or if base is given, then x must be a string or
Unicode object representing an integer literal in the given base.  The
literal can be preceded by ‘+‘ or ‘-‘ and be surrounded by whitespace.
The base defaults to 10.  Valid bases are 0 and 2-36.  Base 0 means to
interpret the base from the string as an integer literal.
>>> int(‘0b100‘, base=0)
# (copied from class doc)
"""
pass

def __int__(self):
""" 转换为整数 """
""" x.__int__() <==> int(x) """
pass

def __invert__(self):
""" x.__invert__() <==> ~x """
pass

def __long__(self):
""" 转换为长整数 """
""" x.__long__() <==> long(x) """
pass

def __lshift__(self, y):
""" x.__lshift__(y) <==> x<<y """
pass

def __mod__(self, y):
""" x.__mod__(y) <==> x%y """
pass

def __mul__(self, y):
""" x.__mul__(y) <==> x*y """
pass

def __neg__(self):
""" x.__neg__() <==> -x """
pass

@staticmethod # known case of __new__
def __new__(S, *more):
""" T.__new__(S, ...) -> a new object with type S, a subtype of T """
pass

def __nonzero__(self):
""" x.__nonzero__() <==> x != 0 """
pass

def __oct__(self):
""" 返回改值的 八进制 表示 """
""" x.__oct__() <==> oct(x) """
pass

def __or__(self, y):
""" x.__or__(y) <==> x|y """
pass

def __pos__(self):
""" x.__pos__() <==> +x """
pass

def __pow__(self, y, z=None):
""" 幂，次方 """
""" x.__pow__(y[, z]) <==> pow(x, y[, z]) """
pass

""" x.__radd__(y) <==> y+x """
pass

def __rand__(self, y):
""" x.__rand__(y) <==> y&x """
pass

def __rdivmod__(self, y):
""" x.__rdivmod__(y) <==> divmod(y, x) """
pass

def __rdiv__(self, y):
""" x.__rdiv__(y) <==> y/x """
pass

def __repr__(self):
"""转化为解释器可读取的形式 """
""" x.__repr__() <==> repr(x) """
pass

def __str__(self):
"""转换为人阅读的形式，如果没有适于人阅读的解释形式的话，则返回解释器课阅读的形式"""
""" x.__str__() <==> str(x) """
pass

def __rfloordiv__(self, y):
""" x.__rfloordiv__(y) <==> y//x """
pass

def __rlshift__(self, y):
""" x.__rlshift__(y) <==> y<<x """
pass

def __rmod__(self, y):
""" x.__rmod__(y) <==> y%x """
pass

def __rmul__(self, y):
""" x.__rmul__(y) <==> y*x """
pass

def __ror__(self, y):
""" x.__ror__(y) <==> y|x """
pass

def __rpow__(self, x, z=None):
""" y.__rpow__(x[, z]) <==> pow(x, y[, z]) """
pass

def __rrshift__(self, y):
""" x.__rrshift__(y) <==> y>>x """
pass

def __rshift__(self, y):
""" x.__rshift__(y) <==> x>>y """
pass

def __rsub__(self, y):
""" x.__rsub__(y) <==> y-x """
pass

def __rtruediv__(self, y):
""" x.__rtruediv__(y) <==> y/x """
pass

def __rxor__(self, y):
""" x.__rxor__(y) <==> y^x """
pass

def __sub__(self, y):
""" x.__sub__(y) <==> x-y """
pass

def __truediv__(self, y):
""" x.__truediv__(y) <==> x/y """
pass

def __trunc__(self, *args, **kwargs):
""" 返回数值被截取为整形的值，在整形中无意义 """
pass

def __xor__(self, y):
""" x.__xor__(y) <==> x^y """
pass

denominator = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
""" 分母 = 1 """
"""the denominator of a rational number in lowest terms"""

imag = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
""" 虚数，无意义 """
"""the imaginary part of a complex number"""

numerator = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
""" 分子 = 数字大小 """
"""the numerator of a rational number in lowest terms"""

real = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
""" 实属，无意义 """
"""the real part of a complex number"""

int```
View Code

### 2、布尔值

真，假

True， False

1， 0

### 3、字符串，str

常用功能

.移除空白

.切片

.分割

.索引

.长度

eg：

a. 首字母大写
p = "abc"
print(p.capitalize())

b.内容居中
p = "abc"
print(p.center(11, "-"))

c.子序列个数
p = "abc is abcd"
print(p.count("a"))
print(p.count("a", 0, 6))

d.是否以xxx结束
p = "abc is abcd"
print(p.endswith("d"))
print(p.endswith("d", 0, 6))

e.寻找子序列位置，如果没找到，返回-1
p = "abc is abcd"
print(p.find("d"))
print(p.find("d", 0, 6))

f.寻找子序列位置，如果没找到，报错
p = "abc is abcd"
print(p.index("k"))

g.连接list的个字符串
p = ["a", "b", "c"]
o = "_".join(p)
print(o)  ```class str(basestring):
"""
str(object=‘‘) -> string

Return a nice string representation of the object.
If the argument is a string, the return value is the same object.
"""
def capitalize(self):
""" 首字母变大写 """
"""
S.capitalize() -> string

Return a copy of the string S with only its first character
capitalized.
"""
return ""

def center(self, width, fillchar=None):
""" 内容居中，width：总长度；fillchar：空白处填充内容，默认无 """
"""
S.center(width[, fillchar]) -> string

Return S centered in a string of length width. Padding is
done using the specified fill character (default is a space)
"""
return ""

def count(self, sub, start=None, end=None):
""" 子序列个数 """
"""
S.count(sub[, start[, end]]) -> int

Return the number of non-overlapping occurrences of substring sub in
string S[start:end].  Optional arguments start and end are interpreted
as in slice notation.
"""
return 0

def decode(self, encoding=None, errors=None):
""" 解码 """
"""
S.decode([encoding[,errors]]) -> object

Decodes S using the codec registered for encoding. encoding defaults
to the default encoding. errors may be given to set a different error
handling scheme. Default is ‘strict‘ meaning that encoding errors raise
a UnicodeDecodeError. Other possible values are ‘ignore‘ and ‘replace‘
as well as any other name registered with codecs.register_error that is
able to handle UnicodeDecodeErrors.
"""
return object()

def encode(self, encoding=None, errors=None):
""" 编码，针对unicode """
"""
S.encode([encoding[,errors]]) -> object

Encodes S using the codec registered for encoding. encoding defaults
to the default encoding. errors may be given to set a different error
handling scheme. Default is ‘strict‘ meaning that encoding errors raise
a UnicodeEncodeError. Other possible values are ‘ignore‘, ‘replace‘ and
‘xmlcharrefreplace‘ as well as any other name registered with
codecs.register_error that is able to handle UnicodeEncodeErrors.
"""
return object()

def endswith(self, suffix, start=None, end=None):
""" 是否以 xxx 结束 """
"""
S.endswith(suffix[, start[, end]]) -> bool

Return True if S ends with the specified suffix, False otherwise.
With optional start, test S beginning at that position.
With optional end, stop comparing S at that position.
suffix can also be a tuple of strings to try.
"""
return False

def expandtabs(self, tabsize=None):
""" 将tab转换成空格，默认一个tab转换成8个空格 """
"""
S.expandtabs([tabsize]) -> string

Return a copy of S where all tab characters are expanded using spaces.
If tabsize is not given, a tab size of 8 characters is assumed.
"""
return ""

def find(self, sub, start=None, end=None):
""" 寻找子序列位置，如果没找到，返回 -1 """
"""
S.find(sub [,start [,end]]) -> int

Return the lowest index in S where substring sub is found,
such that sub is contained within S[start:end].  Optional
arguments start and end are interpreted as in slice notation.

Return -1 on failure.
"""
return 0

def format(*args, **kwargs): # known special case of str.format
""" 字符串格式化，动态参数，将函数式编程时细说 """
"""
S.format(*args, **kwargs) -> string

Return a formatted version of S, using substitutions from args and kwargs.
The substitutions are identified by braces (‘{‘ and ‘}‘).
"""
pass

def index(self, sub, start=None, end=None):
""" 子序列位置，如果没找到，报错 """
S.index(sub [,start [,end]]) -> int

Like S.find() but raise ValueError when the substring is not found.
"""
return 0

def isalnum(self):
""" 是否是字母和数字 """
"""
S.isalnum() -> bool

Return True if all characters in S are alphanumeric
and there is at least one character in S, False otherwise.
"""
return False

def isalpha(self):
""" 是否是字母 """
"""
S.isalpha() -> bool

Return True if all characters in S are alphabetic
and there is at least one character in S, False otherwise.
"""
return False

def isdigit(self):
""" 是否是数字 """
"""
S.isdigit() -> bool

Return True if all characters in S are digits
and there is at least one character in S, False otherwise.
"""
return False

def islower(self):
""" 是否小写 """
"""
S.islower() -> bool

Return True if all cased characters in S are lowercase and there is
at least one cased character in S, False otherwise.
"""
return False

def isspace(self):
"""
S.isspace() -> bool

Return True if all characters in S are whitespace
and there is at least one character in S, False otherwise.
"""
return False

def istitle(self):
"""
S.istitle() -> bool

Return True if S is a titlecased string and there is at least one
character in S, i.e. uppercase characters may only follow uncased
characters and lowercase characters only cased ones. Return False
otherwise.
"""
return False

def isupper(self):
"""
S.isupper() -> bool

Return True if all cased characters in S are uppercase and there is
at least one cased character in S, False otherwise.
"""
return False

def join(self, iterable):
""" 连接 """
"""
S.join(iterable) -> string

Return a string which is the concatenation of the strings in the
iterable.  The separator between elements is S.
"""
return ""

def ljust(self, width, fillchar=None):
""" 内容左对齐，右侧填充 """
"""
S.ljust(width[, fillchar]) -> string

Return S left-justified in a string of length width. Padding is
done using the specified fill character (default is a space).
"""
return ""

def lower(self):
""" 变小写 """
"""
S.lower() -> string

Return a copy of the string S converted to lowercase.
"""
return ""

def lstrip(self, chars=None):
""" 移除左侧空白 """
"""
S.lstrip([chars]) -> string or unicode

Return a copy of the string S with leading whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is unicode, S will be converted to unicode before stripping
"""
return ""

def partition(self, sep):
""" 分割，前，中，后三部分 """
"""
S.partition(sep) -> (head, sep, tail)

Search for the separator sep in S, and return the part before it,
the separator itself, and the part after it.  If the separator is not
found, return S and two empty strings.
"""
pass

def replace(self, old, new, count=None):
""" 替换 """
"""
S.replace(old, new[, count]) -> string

Return a copy of string S with all occurrences of substring
old replaced by new.  If the optional argument count is
given, only the first count occurrences are replaced.
"""
return ""

def rfind(self, sub, start=None, end=None):
"""
S.rfind(sub [,start [,end]]) -> int

Return the highest index in S where substring sub is found,
such that sub is contained within S[start:end].  Optional
arguments start and end are interpreted as in slice notation.

Return -1 on failure.
"""
return 0

def rindex(self, sub, start=None, end=None):
"""
S.rindex(sub [,start [,end]]) -> int

Like S.rfind() but raise ValueError when the substring is not found.
"""
return 0

def rjust(self, width, fillchar=None):
"""
S.rjust(width[, fillchar]) -> string

Return S right-justified in a string of length width. Padding is
done using the specified fill character (default is a space)
"""
return ""

def rpartition(self, sep):
"""
S.rpartition(sep) -> (head, sep, tail)

Search for the separator sep in S, starting at the end of S, and return
the part before it, the separator itself, and the part after it.  If the
separator is not found, return two empty strings and S.
"""
pass

def rsplit(self, sep=None, maxsplit=None):
"""
S.rsplit([sep [,maxsplit]]) -> list of strings

Return a list of the words in the string S, using sep as the
delimiter string, starting at the end of the string and working
to the front.  If maxsplit is given, at most maxsplit splits are
done. If sep is not specified or is None, any whitespace string
is a separator.
"""
return []

def rstrip(self, chars=None):
"""
S.rstrip([chars]) -> string or unicode

Return a copy of the string S with trailing whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is unicode, S will be converted to unicode before stripping
"""
return ""

def split(self, sep=None, maxsplit=None):
""" 分割， maxsplit最多分割几次 """
"""
S.split([sep [,maxsplit]]) -> list of strings

Return a list of the words in the string S, using sep as the
delimiter string.  If maxsplit is given, at most maxsplit
splits are done. If sep is not specified or is None, any
whitespace string is a separator and empty strings are removed
from the result.
"""
return []

def splitlines(self, keepends=False):
""" 根据换行分割 """
"""
S.splitlines(keepends=False) -> list of strings

Return a list of the lines in S, breaking at line boundaries.
Line breaks are not included in the resulting list unless keepends
is given and true.
"""
return []

def startswith(self, prefix, start=None, end=None):
""" 是否起始 """
"""
S.startswith(prefix[, start[, end]]) -> bool

Return True if S starts with the specified prefix, False otherwise.
With optional start, test S beginning at that position.
With optional end, stop comparing S at that position.
prefix can also be a tuple of strings to try.
"""
return False

def strip(self, chars=None):
""" 移除两段空白 """
"""
S.strip([chars]) -> string or unicode

Return a copy of the string S with leading and trailing
whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is unicode, S will be converted to unicode before stripping
"""
return ""

def swapcase(self):
""" 大写变小写，小写变大写 """
"""
S.swapcase() -> string

Return a copy of the string S with uppercase characters
converted to lowercase and vice versa.
"""
return ""

def title(self):
"""
S.title() -> string

Return a titlecased version of S, i.e. words start with uppercase
characters, all remaining cased characters have lowercase.
"""
return ""

def translate(self, table, deletechars=None):
"""
转换，需要先做一个对应表，最后一个表示删除字符集合
intab = "aeiou"
outtab = "12345"
trantab = maketrans(intab, outtab)
str = "this is string example....wow!!!"
print str.translate(trantab, ‘xm‘)
"""

"""
S.translate(table [,deletechars]) -> string

Return a copy of the string S, where all characters occurring
in the optional argument deletechars are removed, and the
remaining characters have been mapped through the given
translation table, which must be a string of length 256 or None.
If the table argument is None, no translation is applied and
the operation simply removes the characters in deletechars.
"""
return ""

def upper(self):
"""
S.upper() -> string

Return a copy of the string S converted to uppercase.
"""
return ""

def zfill(self, width):
"""方法返回指定长度的字符串，原字符串右对齐，前面填充0。"""
"""
S.zfill(width) -> string

Pad a numeric string S with zeros on the left, to fill a field
of the specified width.  The string S is never truncated.
"""
return ""

def _formatter_field_name_split(self, *args, **kwargs): # real signature unknown
pass

def _formatter_parser(self, *args, **kwargs): # real signature unknown
pass

""" x.__add__(y) <==> x+y """
pass

def __contains__(self, y):
""" x.__contains__(y) <==> y in x """
pass

def __eq__(self, y):
""" x.__eq__(y) <==> x==y """
pass

def __format__(self, format_spec):
"""
S.__format__(format_spec) -> string

Return a formatted version of S as described by format_spec.
"""
return ""

def __getattribute__(self, name):
""" x.__getattribute__(‘name‘) <==> x.name """
pass

def __getitem__(self, y):
""" x.__getitem__(y) <==> x[y] """
pass

def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass

def __getslice__(self, i, j):
"""
x.__getslice__(i, j) <==> x[i:j]

Use of negative indices is not supported.
"""
pass

def __ge__(self, y):
""" x.__ge__(y) <==> x>=y """
pass

def __gt__(self, y):
""" x.__gt__(y) <==> x>y """
pass

def __hash__(self):
""" x.__hash__() <==> hash(x) """
pass

def __init__(self, string=‘‘): # known special case of str.__init__
"""
str(object=‘‘) -> string

Return a nice string representation of the object.
If the argument is a string, the return value is the same object.
# (copied from class doc)
"""
pass

def __len__(self):
""" x.__len__() <==> len(x) """
pass

def __le__(self, y):
""" x.__le__(y) <==> x<=y """
pass

def __lt__(self, y):
""" x.__lt__(y) <==> x<y """
pass

def __mod__(self, y):
""" x.__mod__(y) <==> x%y """
pass

def __mul__(self, n):
""" x.__mul__(n) <==> x*n """
pass

@staticmethod # known case of __new__
def __new__(S, *more):
""" T.__new__(S, ...) -> a new object with type S, a subtype of T """
pass

def __ne__(self, y):
""" x.__ne__(y) <==> x!=y """
pass

def __repr__(self):
""" x.__repr__() <==> repr(x) """
pass

def __rmod__(self, y):
""" x.__rmod__(y) <==> y%x """
pass

def __rmul__(self, n):
""" x.__rmul__(n) <==> n*x """
pass

def __sizeof__(self):
""" S.__sizeof__() -> size of S in memory, in bytes """
pass

def __str__(self):
""" x.__str__() <==> str(x) """
pass

str```
str

### 4.list

常用功能：

切片

索引

分割

追加

删除

长度

循环

包含

eg：

a.在list后面增加参数

a = [‘a‘, ‘b‘, ‘c‘]
a.append(‘s‘)
print(a)

b.统计参数次数
a = [‘a‘, ‘b‘, ‘c‘]
print(a.count(‘a‘))

c.在list加入另一个list
a = [‘a‘, ‘b‘, ‘c‘]
b = [11, 22, 33]
a.extend(b)
print(a)

d.list里value的位置
a = [‘a‘, ‘b‘, ‘c‘]
b = a.index(‘b‘)
print(b)

e.在list里面插入参数
a = [‘a‘, ‘b‘, ‘c‘]
a.insert(1, ‘d‘)
print(a)

f.取出list最后的参数
a = [‘a‘, ‘b‘, ‘c‘]
b = a.pop()
print(b)
print(a)

g.移除list的某个参数
a = [‘a‘, ‘b‘, ‘c‘]
a.remove(‘b‘)
print(a)

h.list参数反序
a = [‘a‘, ‘b‘, ‘c‘]
a.reverse()
print(a)  ```class list(object):
"""
list() -> new empty list
list(iterable) -> new list initialized from iterable‘s items
"""
def append(self, p_object): # real signature unknown; restored from __doc__
""" L.append(object) -- append object to end """
pass

def count(self, value): # real signature unknown; restored from __doc__
""" L.count(value) -> integer -- return number of occurrences of value """
return 0

def extend(self, iterable): # real signature unknown; restored from __doc__
""" L.extend(iterable) -- extend list by appending elements from the iterable """
pass

def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
"""
L.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
"""
return 0

def insert(self, index, p_object): # real signature unknown; restored from __doc__
""" L.insert(index, object) -- insert object before index """
pass

def pop(self, index=None): # real signature unknown; restored from __doc__
"""
L.pop([index]) -> item -- remove and return item at index (default last).
Raises IndexError if list is empty or index is out of range.
"""
pass

def remove(self, value): # real signature unknown; restored from __doc__
"""
L.remove(value) -- remove first occurrence of value.
Raises ValueError if the value is not present.
"""
pass

def reverse(self): # real signature unknown; restored from __doc__
""" L.reverse() -- reverse *IN PLACE* """
pass

def sort(self, cmp=None, key=None, reverse=False): # real signature unknown; restored from __doc__
"""
L.sort(cmp=None, key=None, reverse=False) -- stable sort *IN PLACE*;
cmp(x, y) -> -1, 0, 1
"""
pass

def __add__(self, y): # real signature unknown; restored from __doc__
""" x.__add__(y) <==> x+y """
pass

def __contains__(self, y): # real signature unknown; restored from __doc__
""" x.__contains__(y) <==> y in x """
pass

def __delitem__(self, y): # real signature unknown; restored from __doc__
""" x.__delitem__(y) <==> del x[y] """
pass

def __delslice__(self, i, j): # real signature unknown; restored from __doc__
"""
x.__delslice__(i, j) <==> del x[i:j]

Use of negative indices is not supported.
"""
pass

def __eq__(self, y): # real signature unknown; restored from __doc__
""" x.__eq__(y) <==> x==y """
pass

def __getattribute__(self, name): # real signature unknown; restored from __doc__
""" x.__getattribute__(‘name‘) <==> x.name """
pass

def __getitem__(self, y): # real signature unknown; restored from __doc__
""" x.__getitem__(y) <==> x[y] """
pass

def __getslice__(self, i, j): # real signature unknown; restored from __doc__
"""
x.__getslice__(i, j) <==> x[i:j]

Use of negative indices is not supported.
"""
pass

def __ge__(self, y): # real signature unknown; restored from __doc__
""" x.__ge__(y) <==> x>=y """
pass

def __gt__(self, y): # real signature unknown; restored from __doc__
""" x.__gt__(y) <==> x>y """
pass

def __iadd__(self, y): # real signature unknown; restored from __doc__
""" x.__iadd__(y) <==> x+=y """
pass

def __imul__(self, y): # real signature unknown; restored from __doc__
""" x.__imul__(y) <==> x*=y """
pass

def __init__(self, seq=()): # known special case of list.__init__
"""
list() -> new empty list
list(iterable) -> new list initialized from iterable‘s items
# (copied from class doc)
"""
pass

def __iter__(self): # real signature unknown; restored from __doc__
""" x.__iter__() <==> iter(x) """
pass

def __len__(self): # real signature unknown; restored from __doc__
""" x.__len__() <==> len(x) """
pass

def __le__(self, y): # real signature unknown; restored from __doc__
""" x.__le__(y) <==> x<=y """
pass

def __lt__(self, y): # real signature unknown; restored from __doc__
""" x.__lt__(y) <==> x<y """
pass

def __mul__(self, n): # real signature unknown; restored from __doc__
""" x.__mul__(n) <==> x*n """
pass

@staticmethod # known case of __new__
def __new__(S, *more): # real signature unknown; restored from __doc__
""" T.__new__(S, ...) -> a new object with type S, a subtype of T """
pass

def __ne__(self, y): # real signature unknown; restored from __doc__
""" x.__ne__(y) <==> x!=y """
pass

def __repr__(self): # real signature unknown; restored from __doc__
""" x.__repr__() <==> repr(x) """
pass

def __reversed__(self): # real signature unknown; restored from __doc__
""" L.__reversed__() -- return a reverse iterator over the list """
pass

def __rmul__(self, n): # real signature unknown; restored from __doc__
""" x.__rmul__(n) <==> n*x """
pass

def __setitem__(self, i, y): # real signature unknown; restored from __doc__
""" x.__setitem__(i, y) <==> x[i]=y """
pass

def __setslice__(self, i, j, y): # real signature unknown; restored from __doc__
"""
x.__setslice__(i, j, y) <==> x[i:j]=y

Use  of negative indices is not supported.
"""
pass

def __sizeof__(self): # real signature unknown; restored from __doc__
""" L.__sizeof__() -- size of L in memory, in bytes """
pass

__hash__ = None

list```
list

### 5.元祖，tuple

基本操作

索引

切片

长度

循环

包含

eg：

a.统计tuple参数出现的次数

a = (‘a‘, ‘b‘, ‘c‘)
print(a.count("b"))

b.查找参数是否存在于tuple，并显示位置

a = (‘a‘, ‘b‘, ‘c‘)
print(a.index("c", 1, 3))  ```lass tuple(object):
"""
tuple() -> empty tuple
tuple(iterable) -> tuple initialized from iterable‘s items

If the argument is a tuple, the return value is the same object.
"""
def count(self, value): # real signature unknown; restored from __doc__
""" T.count(value) -> integer -- return number of occurrences of value """
return 0

def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
"""
T.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
"""
return 0

def __add__(self, y): # real signature unknown; restored from __doc__
""" x.__add__(y) <==> x+y """
pass

def __contains__(self, y): # real signature unknown; restored from __doc__
""" x.__contains__(y) <==> y in x """
pass

def __eq__(self, y): # real signature unknown; restored from __doc__
""" x.__eq__(y) <==> x==y """
pass

def __getattribute__(self, name): # real signature unknown; restored from __doc__
""" x.__getattribute__(‘name‘) <==> x.name """
pass

def __getitem__(self, y): # real signature unknown; restored from __doc__
""" x.__getitem__(y) <==> x[y] """
pass

def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass

def __getslice__(self, i, j): # real signature unknown; restored from __doc__
"""
x.__getslice__(i, j) <==> x[i:j]

Use of negative indices is not supported.
"""
pass

def __ge__(self, y): # real signature unknown; restored from __doc__
""" x.__ge__(y) <==> x>=y """
pass

def __gt__(self, y): # real signature unknown; restored from __doc__
""" x.__gt__(y) <==> x>y """
pass

def __hash__(self): # real signature unknown; restored from __doc__
""" x.__hash__() <==> hash(x) """
pass

def __init__(self, seq=()): # known special case of tuple.__init__
"""
tuple() -> empty tuple
tuple(iterable) -> tuple initialized from iterable‘s items

If the argument is a tuple, the return value is the same object.
# (copied from class doc)
"""
pass

def __iter__(self): # real signature unknown; restored from __doc__
""" x.__iter__() <==> iter(x) """
pass

def __len__(self): # real signature unknown; restored from __doc__
""" x.__len__() <==> len(x) """
pass

def __le__(self, y): # real signature unknown; restored from __doc__
""" x.__le__(y) <==> x<=y """
pass

def __lt__(self, y): # real signature unknown; restored from __doc__
""" x.__lt__(y) <==> x<y """
pass

def __mul__(self, n): # real signature unknown; restored from __doc__
""" x.__mul__(n) <==> x*n """
pass

@staticmethod # known case of __new__
def __new__(S, *more): # real signature unknown; restored from __doc__
""" T.__new__(S, ...) -> a new object with type S, a subtype of T """
pass

def __ne__(self, y): # real signature unknown; restored from __doc__
""" x.__ne__(y) <==> x!=y """
pass

def __repr__(self): # real signature unknown; restored from __doc__
""" x.__repr__() <==> repr(x) """
pass

def __rmul__(self, n): # real signature unknown; restored from __doc__
""" x.__rmul__(n) <==> n*x """
pass

def __sizeof__(self): # real signature unknown; restored from __doc__
""" T.__sizeof__() -- size of T in memory, in bytes """
pass

tuple```
tuple

7.字典，dict

dict是无须的

基本操作：

索引

新增

删除

键、值、键值对

循环

长度

eg：

a.清楚dict内容

a = {‘a‘:‘A‘, ‘b‘:‘B‘, ‘c‘:‘C‘}
b = a.clear()
print(b)

b.拷贝

a = {‘a‘:‘A‘, ‘b‘:‘B‘, ‘c‘:‘C‘}

b = a.copy()
print(b)

c.根据key获取value，如果不存在则返回None
a = {‘a‘:‘A‘, ‘b‘:‘B‘, ‘c‘:‘C‘}
b = a.get(‘a‘)
c = a.get(‘d‘)
print(b, c)

d.判断key是否存在于dict，是True，否None（py3没有）
a = {‘a‘:‘A‘, ‘b‘:‘B‘, ‘c‘:‘C‘}
print(a.has_key(‘a‘))

e.所有项的列表形式（py3没有）
a = {‘a‘:‘A‘, ‘b‘:‘B‘, ‘c‘:‘C‘}
print(a.items())  ```class dict(object):
"""
dict() -> new empty dictionary
dict(mapping) -> new dictionary initialized from a mapping object‘s
(key, value) pairs
dict(iterable) -> new dictionary initialized as if via:
d = {}
for k, v in iterable:
d[k] = v
dict(**kwargs) -> new dictionary initialized with the name=value pairs
in the keyword argument list.  For example:  dict(one=1, two=2)
"""

def clear(self): # real signature unknown; restored from __doc__
""" 清除内容 """
""" D.clear() -> None.  Remove all items from D. """
pass

def copy(self): # real signature unknown; restored from __doc__
""" 浅拷贝 """
""" D.copy() -> a shallow copy of D """
pass

@staticmethod # known case
def fromkeys(S, v=None): # real signature unknown; restored from __doc__
"""
dict.fromkeys(S[,v]) -> New dict with keys from S and values equal to v.
v defaults to None.
"""
pass

def get(self, k, d=None): # real signature unknown; restored from __doc__
""" 根据key获取值，d是默认值 """
""" D.get(k[,d]) -> D[k] if k in D, else d.  d defaults to None. """
pass

def has_key(self, k): # real signature unknown; restored from __doc__
""" 是否有key """
""" D.has_key(k) -> True if D has a key k, else False """
return False

def items(self): # real signature unknown; restored from __doc__
""" 所有项的列表形式 """
""" D.items() -> list of D‘s (key, value) pairs, as 2-tuples """
return []

def iteritems(self): # real signature unknown; restored from __doc__
""" 项可迭代 """
""" D.iteritems() -> an iterator over the (key, value) items of D """
pass

def iterkeys(self): # real signature unknown; restored from __doc__
""" key可迭代 """
""" D.iterkeys() -> an iterator over the keys of D """
pass

def itervalues(self): # real signature unknown; restored from __doc__
""" value可迭代 """
""" D.itervalues() -> an iterator over the values of D """
pass

def keys(self): # real signature unknown; restored from __doc__
""" 所有的key列表 """
""" D.keys() -> list of D‘s keys """
return []

def pop(self, k, d=None): # real signature unknown; restored from __doc__
""" 获取并在字典中移除 """
"""
D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
If key is not found, d is returned if given, otherwise KeyError is raised
"""
pass

def popitem(self): # real signature unknown; restored from __doc__
""" 获取并在字典中移除 """
"""
D.popitem() -> (k, v), remove and return some (key, value) pair as a
2-tuple; but raise KeyError if D is empty.
"""
pass

def setdefault(self, k, d=None): # real signature unknown; restored from __doc__
""" 如果key不存在，则创建，如果存在，则返回已存在的值且不修改 """
""" D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D """
pass

def update(self, E=None, **F): # known special case of dict.update
""" 更新
{‘name‘:‘alex‘, ‘age‘: 18000}
[(‘name‘,‘sbsbsb‘),]
"""
"""
D.update([E, ]**F) -> None.  Update D from dict/iterable E and F.
If E present and has a .keys() method, does:     for k in E: D[k] = E[k]
If E present and lacks .keys() method, does:     for (k, v) in E: D[k] = v
In either case, this is followed by: for k in F: D[k] = F[k]
"""
pass

def values(self): # real signature unknown; restored from __doc__
""" 所有的值 """
""" D.values() -> list of D‘s values """
return []

def viewitems(self): # real signature unknown; restored from __doc__
""" 所有项，只是将内容保存至view对象中 """
""" D.viewitems() -> a set-like object providing a view on D‘s items """
pass

def viewkeys(self): # real signature unknown; restored from __doc__
""" D.viewkeys() -> a set-like object providing a view on D‘s keys """
pass

def viewvalues(self): # real signature unknown; restored from __doc__
""" D.viewvalues() -> an object providing a view on D‘s values """
pass

def __cmp__(self, y): # real signature unknown; restored from __doc__
""" x.__cmp__(y) <==> cmp(x,y) """
pass

def __contains__(self, k): # real signature unknown; restored from __doc__
""" D.__contains__(k) -> True if D has a key k, else False """
return False

def __delitem__(self, y): # real signature unknown; restored from __doc__
""" x.__delitem__(y) <==> del x[y] """
pass

def __eq__(self, y): # real signature unknown; restored from __doc__
""" x.__eq__(y) <==> x==y """
pass

def __getattribute__(self, name): # real signature unknown; restored from __doc__
""" x.__getattribute__(‘name‘) <==> x.name """
pass

def __getitem__(self, y): # real signature unknown; restored from __doc__
""" x.__getitem__(y) <==> x[y] """
pass

def __ge__(self, y): # real signature unknown; restored from __doc__
""" x.__ge__(y) <==> x>=y """
pass

def __gt__(self, y): # real signature unknown; restored from __doc__
""" x.__gt__(y) <==> x>y """
pass

def __init__(self, seq=None, **kwargs): # known special case of dict.__init__
"""
dict() -> new empty dictionary
dict(mapping) -> new dictionary initialized from a mapping object‘s
(key, value) pairs
dict(iterable) -> new dictionary initialized as if via:
d = {}
for k, v in iterable:
d[k] = v
dict(**kwargs) -> new dictionary initialized with the name=value pairs
in the keyword argument list.  For example:  dict(one=1, two=2)
# (copied from class doc)
"""
pass

def __iter__(self): # real signature unknown; restored from __doc__
""" x.__iter__() <==> iter(x) """
pass

def __len__(self): # real signature unknown; restored from __doc__
""" x.__len__() <==> len(x) """
pass

def __le__(self, y): # real signature unknown; restored from __doc__
""" x.__le__(y) <==> x<=y """
pass

def __lt__(self, y): # real signature unknown; restored from __doc__
""" x.__lt__(y) <==> x<y """
pass

@staticmethod # known case of __new__
def __new__(S, *more): # real signature unknown; restored from __doc__
""" T.__new__(S, ...) -> a new object with type S, a subtype of T """
pass

def __ne__(self, y): # real signature unknown; restored from __doc__
""" x.__ne__(y) <==> x!=y """
pass

def __repr__(self): # real signature unknown; restored from __doc__
""" x.__repr__() <==> repr(x) """
pass

def __setitem__(self, i, y): # real signature unknown; restored from __doc__
""" x.__setitem__(i, y) <==> x[i]=y """
pass

def __sizeof__(self): # real signature unknown; restored from __doc__
""" D.__sizeof__() -> size of D in memory, in bytes """
pass

__hash__ = None

dict```
dict
1、for循环
用户按照顺序循环可迭代对象中的内容，
PS：break、continue
 1 2 3 `li ``=` `[``11``,``22``,``33``,``44``]` `for` `item ``in` `li:` `    ``print` `item`
2、enumrate
为可迭代的对象添加序号
 1 2 3 `li ``=` `[``11``,``22``,``33``]` `for` `k,v ``in` `enumerate``(li, ``1``):` `    ``print``(k,v)`
3、range和xrange
指定范围，生成指定的数字
 1 2 3 4 5 6 7 8 `print` `range``(``1``, ``10``)` `# 结果：[1, 2, 3, 4, 5, 6, 7, 8, 9]`   `print` `range``(``1``, ``10``, ``2``)` `# 结果：[1, 3, 5, 7, 9]`   `print` `range``(``30``, ``0``, ``-``2``)` `# 结果：[30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2]　` 0
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