一、内置函数
Python内置了函数，它们按字母顺序排列如下：
| 内置函数 | ||||
| abs() | delattr() | help() | next() | slice() |
| all() | dict() | hex() |
object() |
sorted() |
| any() | dir() | id() | oct() | staticmethod() |
| ascii() | divmod() | input() | open() | str() |
| apply() | enumerate() | int() | ord() |
sum() |
| basestring() | eval() | intern() | pow() | super() |
| bin() | exec() | isinstance() | print() | tuple() |
| bool() | execfile() | issubclass() | property() |
type() |
| buffer() | file() | iter() | range() | unichr() |
| bytearray() | filter() | len() | raw_input() | unicode() |
| callable() | float() | list() | reduce() |
vars() |
| chr() | format() | locals() | reload() |
xrange() |
| classmethod() | frozenset() | long() | repr() | zip() |
| cmp() | getattr() | map() | reversed() | __import__() |
| coerce() | globals() | max() | round() | |
| compile() | hasattr() | memoryview() |
set() | |
| complex() | hash() | min() | setattr() |
|
黄色python3新增，标记红色python2特有，标记绿色python2特有但非通用函数；
官方链接如下：内置函数详情；
各内置函数按照功能划分，可分为数学运算、集合类操作、逻辑判断、反射、IO操作、非通用、其他；
二、数学运算
|
函数名 |
备注 |
|
abs(x) |
求绝对值 1、参数可以是整型，也可以是复数 2、若参数是复数，则返回复数的模 |
|
complex([real[, imag]]) |
创建一个复数 |
|
divmod(a, b) |
分别取商和余数 注意：整型、浮点型都可以 |
|
float([x]) |
将一个字符串或数转换为浮点数。如果无参数将返回0.0 |
|
int([x[, base]]) |
将一个字符转换为int类型，base表示进制 |
|
long([x[, base]]) |
将一个字符转换为long类型 |
|
pow(x, y[, z]) |
返回x的y次幂 |
|
range([start], stop[, step]) |
产生一个序列，默认从0开始 |
|
round(x[, n]) |
四舍五入 |
|
sum(iterable[, start]) |
对集合求和 |
|
oct(x) |
将一个数字转化为8进制 |
|
hex(x) |
将整数x转换为16进制字符串 |
|
chr(i) |
返回整数i对应的ASCII字符 |
|
bin(x) |
将整数x转换为二进制字符串 |
|
bool([x]) |
将x转换为Boolean类型 |
1、abs函数说明
def abs(number): # real signature unknown; restored from __doc__
"""
abs(number) -> number
Return the absolute value of the argument.
"""
return 0
返回数字的绝对值，参数可以是整数或浮点数，如果参数是复数，则返回其大小；
例如：
>>> x = -1
>>> abs(x)
1
>>> x = 1.1
>>> abs(x)
1.1
2、complex函数说明
class complex(object): """ complex(real[, imag]) -> complex number Create a complex number from a real part and an optional imaginary part. This is equivalent to (real + imag*1j) where imag defaults to 0. """ def conjugate(self): # real signature unknown; restored from __doc__ """ complex.conjugate() -> complex Return the complex conjugate of its argument. (3-4j).conjugate() == 3+4j. """ return complex def __abs__(self): # real signature unknown; restored from __doc__ """ x.__abs__() <==> abs(x) """ pass def __add__(self, y): # real signature unknown; restored from __doc__ """ x.__add__(y) <==> x+y """ pass def __coerce__(self, y): # real signature unknown; restored from __doc__ """ x.__coerce__(y) <==> coerce(x, y) """ pass def __divmod__(self, y): # real signature unknown; restored from __doc__ """ x.__divmod__(y) <==> divmod(x, y) """ pass def __div__(self, y): # real signature unknown; restored from __doc__ """ x.__div__(y) <==> x/y """ pass def __eq__(self, y): # real signature unknown; restored from __doc__ """ x.__eq__(y) <==> x==y """ pass def __float__(self): # real signature unknown; restored from __doc__ """ x.__float__() <==> float(x) """ pass def __floordiv__(self, y): # real signature unknown; restored from __doc__ """ x.__floordiv__(y) <==> x//y """ pass def __format__(self): # real signature unknown; restored from __doc__ """ complex.__format__() -> str Convert to a string according to format_spec. """ return "" def __getattribute__(self, name): # real signature unknown; restored from __doc__ """ x.__getattribute__('name') <==> x.name """ pass def __getnewargs__(self, *args, **kwargs): # real signature unknown 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, real, imag=None): # real signature unknown; restored from __doc__ pass def __int__(self): # real signature unknown; restored from __doc__ """ x.__int__() <==> int(x) """ pass def __le__(self, y): # real signature unknown; restored from __doc__ """ x.__le__(y) <==> x<=y """ pass def __long__(self): # real signature unknown; restored from __doc__ """ x.__long__() <==> long(x) """ pass def __lt__(self, y): # real signature unknown; restored from __doc__ """ x.__lt__(y) <==> x<y """ pass def __mod__(self, y): # real signature unknown; restored from __doc__ """ x.__mod__(y) <==> x%y """ pass def __mul__(self, y): # real signature unknown; restored from __doc__ """ x.__mul__(y) <==> x*y """ pass def __neg__(self): # real signature unknown; restored from __doc__ """ x.__neg__() <==> -x """ 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 __nonzero__(self): # real signature unknown; restored from __doc__ """ x.__nonzero__() <==> x != 0 """ pass def __pos__(self): # real signature unknown; restored from __doc__ """ x.__pos__() <==> +x """ pass def __pow__(self, y, z=None): # real signature unknown; restored from __doc__ """ x.__pow__(y[, z]) <==> pow(x, y[, z]) """ pass def __radd__(self, y): # real signature unknown; restored from __doc__ """ x.__radd__(y) <==> y+x """ pass def __rdivmod__(self, y): # real signature unknown; restored from __doc__ """ x.__rdivmod__(y) <==> divmod(y, x) """ pass def __rdiv__(self, y): # real signature unknown; restored from __doc__ """ x.__rdiv__(y) <==> y/x """ pass def __repr__(self): # real signature unknown; restored from __doc__ """ x.__repr__() <==> repr(x) """ pass def __rfloordiv__(self, y): # real signature unknown; restored from __doc__ """ x.__rfloordiv__(y) <==> y//x """ pass def __rmod__(self, y): # real signature unknown; restored from __doc__ """ x.__rmod__(y) <==> y%x """ pass def __rmul__(self, y): # real signature unknown; restored from __doc__ """ x.__rmul__(y) <==> y*x """ pass def __rpow__(self, x, z=None): # real signature unknown; restored from __doc__ """ y.__rpow__(x[, z]) <==> pow(x, y[, z]) """ pass def __rsub__(self, y): # real signature unknown; restored from __doc__ """ x.__rsub__(y) <==> y-x """ pass def __rtruediv__(self, y): # real signature unknown; restored from __doc__ """ x.__rtruediv__(y) <==> y/x """ pass def __str__(self): # real signature unknown; restored from __doc__ """ x.__str__() <==> str(x) """ pass def __sub__(self, y): # real signature unknown; restored from __doc__ """ x.__sub__(y) <==> x-y """ pass def __truediv__(self, y): # real signature unknown; restored from __doc__ """ x.__truediv__(y) <==> x/y """ pass imag = property(lambda self: 0.0) """the imaginary part of a complex number :type: float """ real = property(lambda self: 0.0) """the real part of a complex number :type: float """ complex