関数・外部手続き
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関数・外部手続き
>>> def fact(n): ... k = 1 ... for m in range(n): ... k = k*(m + 1) ... return k ... >>> print fact(2), fact(3), fact(4), fact(5), fact(6) 2 6 24 120 720 >>> >>> def fact(n): ... if (n == 0): ... return 1 ... else: ... return n*fact(n - 1) ... >>> print fact(2), fact(3), fact(4), fact(5) 2 6 24 120 >>> >>> print sin(0.1) NameError: name 'sin' is not defined >>> from math import sin >>> print sin(0.1) 0.0998334166468 >>> >>> from math import * >>> dir() ['__builtins__', '__doc__', '__name__', 'acos', 'asin', 'atan', 'atan2', 'ceil', 'cos', 'cosh', 'degrees', 'e', 'exp', 'fabs', 'floor', 'fmod', 'frexp', 'hypot', 'ldexp', 'log', 'log10', 'modf', 'pi', 'pow', 'radians', 'sin', 'sinh', 'sqrt', 'tan', 'tanh'] >>> >>> help(sin) Help on built-in function sin: sin(...) sin(x) Return the sine of x (measured in radians). >>> >>> a = [1, 2, 3]; dir(a) ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__delslice__', '__doc__', '__eq__', '__ge__', '__getattribute__', '__getitem__', '__getslice__', '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmul__', '__setattr__', '__setitem__', '__setslice__', '__str__', 'append', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort'] >>> help(a.reverse) Help on built-in function reverse: reverse(...) L.reverse() -- reverse *IN PLACE* >>> print a.reverse() None >>> print a [3, 2, 1] >>>
関数・外部手続き.txt · 最終更新: 2022/08/23 13:34 by 127.0.0.1