Question

假设我有代码（虽然它没有做任何事情，只是一个例子）

def myprint():
    print("foobar")
foo = random.randint(1, 6)
myprint() * foo    #Obviously doesn't work

我想要它做的是执行print()'foo'次。我该怎么做？

Answer 1

您可以将代码更改为此代码：

def myprint(times):
    print(times*"foobar")
foo = random.randint(1, 6)
myprint(foo)

Answer 2

“pythonic”方式是for-loop：

for n in range(foo):
    printfunc()

（请注意，如果您像在python 3中一样定义打印，则使用自己的方法屏蔽原始print。

Answer 3

for i in range(foo):
    print('test')

如果你真的想把它当作一个表达式来回归任意（通常是非常糟糕的，或者至少是极端的hackish，形式）......

[print('test') for _ in range(foo)]

Answer 4

或者，如果您想要隐瞒它并惹恼人们阅读您的代码：

import random
print('\n'.join(["foo" for _ in range(random.randint(1,6))]))

Answer 5

这就是为什么你不应该调用自己的函数print

Python 3.2 (r32:88445, Dec  8 2011, 15:26:51) 
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> help(print)

Help on built-in function print in module builtins:

print(...)
    print(value, ..., sep=' ', end='\n', file=sys.stdout)

    Prints the values to a stream, or to sys.stdout by default.
    Optional keyword arguments:
    file: a file-like object (stream); defaults to the current sys.stdout.
    sep:  string inserted between values, default a space.
    end:  string appended after the last value, default a newline.


>>> def print():
...     print("foobar")
... 
>>> help(print)

Help on function print in module __main__:

print()


>>>

oops现在你已经覆盖了内置print，所以你不能用它来实际打印东西了

如何在同一行上多次打印功能，例如打印（ '测试'）* 3

5 个答案: