关于python:os.path.getsize报告一个文件大小，结尾是L，为什么？

os.path.getsize reports a filesize with an L at the end, why?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

import os, sys

def crawlLocalDirectories(directoryToCrawl):
crawledDirectory = [os.path.join(path, subname) for path, dirnames, filenames in os.walk(directoryToCrawl) for subname in dirnames + filenames]
return crawledDirectory

print crawlLocalDirectories('.')

dictionarySize = {}
def getSizeOfFiles(filesToMeasure):
for everyFile in filesToMeasure:
size = os.path.getsize(everyFile)
dictionarySize[everyFile] = size
return dictionarySize

print getSizeOfFiles(crawlLocalDirectories('.'))

每当这是跑，我得到的输出的{'example.py':392L}，为什么？什么是安全的？我不想有strip我在最后的地方。

如果我运行它无adding它到一个字典，它是与filesize作为392回来的。

相关讨论

只有在交互模式下或通过repr()获得字符串表示形式时才会显示。正如Zigg所写，你可以忽略它。把这当作一个实现细节。当区分普通int和long int很重要时，它可能在时间上很有用。例如，在python 3中，没有L。无论有多大，int都是int：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

d:\>py
Python 3.2.1 (default, Jul 10 2011, 20:02:51) [MSC v.1500 64 bit (AMD64)] on win
32
Type"help","copyright","credits" or"license" for more information.
>>> a = 100000000000000000000000000000000000000000000
>>> a
100000000000000000000000000000000000000000000
>>> ^Z

d:\>python
Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] on win
32
Type"help","copyright","credits" or"license" for more information.
>>> a = 100000000000000000000000000000000000000000000
>>> a
100000000000000000000000000000000000000000000L
>>>

注意python 2.7中的L，但是python 3.2中没有类似的内容。