I am trying to print an integer in Python 2.6.1 with commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way. It does not need to be locale-specific to decide between periods and commas. I would prefer something as simple as reasonably p
我想用逗号作为数千个分隔符在Python 2.6.1中打印一个整数。 例如，我想显示1234567号码为1,234,567 。 我会如何去做这件事？ 我在Google上看到了很多例子，但我正在寻找最简单的实用方法。 它不需要特定于语言环境来决定句点和逗号。 我宁愿尽可能简单的事情。 对于Python≥2.7： "{:,}".format(value) 按格式规范迷你语言， ','选项表示使用千位分隔符的逗号。 对于可识别语言环境的分隔符，请改为使用
This question already has an answer here: Why doesn't Python have multiline comments? 16 answers Python does not have such a mechanism. Prepend a # to each line to block comment. For more information see PEP 8. Most Python IDEs support a mechanism to do the block-commenting-with-pound-signs automatically for you. For example, in IDLE on my machine, it's Alt+3 and Alt+4. Don'
这个问题在这里已经有了答案： 为什么Python没有多行注释？ 16个答案 Python没有这样的机制。 在每行前加一个#来阻止评论。 有关更多信息，请参阅PEP 8.大多数Python IDE支持一种自动为您执行块注释 - 磅 - 符号的机制。 例如，在我的机器上的IDLE中，它是Alt + 3和Alt + 4。 不要使用三重引号; 正如您发现的那样，这是针对文档字符串而不是阻止评论的，尽管它具有类似的效果。 如果你只是临时评论事情，这可以作为
Possible Duplicate: Putting a simple if-then statement on one line I am working on a python expression and I want that expression to be compressed than using the if else statement. s = [1, 2, 3, 4] if len(s)>5: print s.index(5) else: print 'cant print' Is there a better way than using as if else statement? You can do: s = [1, 2, 3, 4] print 'y' if len(s) > 5 else 'n' Howev
可能重复： 将简单的if-then语句放在一行上 我正在处理一个python表达式，并且我希望该表达式比使用if else语句进行压缩。 s = [1, 2, 3, 4] if len(s)>5: print s.index(5) else: print 'cant print' 有没有比使用if语句更好的方法？ 你可以做： s = [1, 2, 3, 4] print 'y' if len(s) > 5 else 'n' 不过，我认为这不会让代码更具可读性（一目了然）。 还要注意的是if和else不创建一个循环，他们只是
I have read the links below, but it doesn't address my question. Does Python have a ternary conditional operator? (the question is about condensing if-else statement to one line) Is there an easier way of writing an if-elif-else statement so it fits on one line? For example, if expression1: statement1 elif expression2: statement2 else: statement3 [UPDATE] if i>100: x
我已阅读下面的链接，但没有解决我的问题。 Python是否有三元条件运算符？ （这个问题是关于将if-else语句压缩到一行） 是否有更简单的方法来编写if-elif-else语句，以便它适合于一行？ 例如， if expression1: statement1 elif expression2: statement2 else: statement3 [UPDATE] if i>100: x=2 elif i<100: x=1 else: x=0 我只是觉得，如果上面的例子可以用下面的方式编写，它可能看起
Possible Duplicate: Ternary conditional operator in Python I am working on python and trying to save data in to database Suppose i had below code conn = mdb.connect(user='root', passwd='redhat', db='Data', host='localhost', charset="utf8") ex_li = ['stri_one','stri_two','stri_three','stri_four'] if ex_li[0] != '': campaignID = ex_li[0] else: campaignID = '' if ex_li[1] != '':
可能重复： Python中的三元条件运算符 我正在研究python并试图将数据保存到数据库中假设我有下面的代码 conn = mdb.connect(user='root', passwd='redhat', db='Data', host='localhost', charset="utf8") ex_li = ['stri_one','stri_two','stri_three','stri_four'] if ex_li[0] != '': campaignID = ex_li[0] else: campaignID = '' if ex_li[1] != '': keywordID = ex_li[1] else: keywordID = '' ...
This question already has an answer here: Does Python have a ternary conditional operator? 22 answers Python has such an operator: variable = something if condition else something_else Alternatively, although not recommended (see @karadoc's comment): variable = (condition and something) or something_else In older Python code, you may see the trick: condition and something or somethi
这个问题在这里已经有了答案： Python是否有三元条件运算符？ 22个答案 Python有这样一个运算符： variable = something if condition else something_else 或者，尽管不推荐（请参阅@ karadoc的评论）： variable = (condition and something) or something_else 在较老的Python代码中，您可能会看到这样的技巧： condition and something or something_else 然而，这已被大大优越的... if ... else ...构造所取代：
我如何创建Python脚本来删除Windows环境系统中临时文件夹中的数据。 你可以这样去import os os.remove("C:WindowsPrefetch*.*") os.remove("C:WindowsTemp*.*") os.remove("C:UsersYour_User_NameAppDataRoamingMicrosoftWindowsRecent Items*.*")
我如何创建Python脚本来删除Windows环境系统中临时文件夹中的数据。 你可以这样去import os os.remove("C:WindowsPrefetch*.*") os.remove("C:WindowsTemp*.*") os.remove("C:UsersYour_User_NameAppDataRoamingMicrosoftWindowsRecent Items*.*")
I have seen a lot of questions (Delete Folder Contents in Python, How to delete a file or folder?, How do I remove/delete a folder that is not empty with Python?) asking how to delete a folder (empty or not) but I haven't seen any asking about how to delete a large number of folders at once. I tried using shutils and writing something as shutils.rmtree('.../run*') (all the folders t
我看到很多问题（删除Python中的文件夹内容，如何删除文件或文件夹？，如何删除/删除Python中没有的文件夹？）询问如何删除文件夹（是否为空）但我还没有看到任何关于如何一次删除大量文件夹的问题。 我尝试使用shutils并将其写成shutils.rmtree('.../run*') （我想要删除的所有文件夹都称为run0000，run0001等等），但这不起作用，因为*未被理解。 最后，我最终导入了subprocess.Popen('rm -r ./run*/', sh
I have a little code that allows me to print images arriving in a folder. But I'd like them to be deleted just after having been printed - I want to try this on a RaspberryPI and I will not have enough space to store all images. If someone can help me it would be very much appreciated. Here is my code: monRep = "/Users/XX/Desktop/XXX/" import os, mimetypes, random while True: fpath
我有一个小小的代码，允许我打印到文件夹中的图像。 但是，我希望在打印后立即删除它们 - 我想在RaspberryPI上尝试此操作，并且我没有足够的空间来存储所有图像。 如果有人能帮助我，将非常感激。 这是我的代码： monRep = "/Users/XX/Desktop/XXX/" import os, mimetypes, random while True: fpaths = [] for fname in os.listdir(monRep): fpath = os.path.join(monRep, fname) if os.path.isf
I'm currently writing a script in python that takes a number of flags. This is my first attempt at such a program, and I am getting an output from the bash script that I don't quite understand. For example when I run the script in the bash shell: $ python my_script.py -f <input_file.txt> -k <test_string> -c <user_input> I get this output before my script's output
我目前正在用Python编写一个脚本，它需要一些标志。 这是我第一次尝试这样的程序，并且我从bash脚本中得到了一个我不太明白的输出。 例如，当我在bash shell中运行脚本时： $ python my_script.py -f <input_file.txt> -k <test_string> -c <user_input> 我在脚本输出之前得到这个输出： usage: rm [-f | -i] [-dPRrvW] file ... unlink file 我似乎无法摆脱这一点，这对于产出的美观感到沮丧。