大约有 13,000 项符合查询结果(耗时:0.0562秒) [XML]
Use curly braces to initialize a Set in Python
I'm learning python, and I have a novice question about initializing sets. Through testing, I've discovered that a set can be initialized like so:
...
What exactly is Python's file.flush() doing?
I found this in the Python documentation for File Objects :
4 Answers
4
...
Python loop counter in a for loop [duplicate]
...code below, is the counter = 0 really required, or is there a better, more Python, way to get access to a loop counter? I saw a few PEPs related to loop counters, but they were either deferred or rejected ( PEP 212 and PEP 281 ).
...
remove None value from a list without removing the 0 value
...-- Yeah. My main problem is that x > y does not imply not x <= y in python because you can do anything in __lt__ and __le__, so why should x not in y imply not x in y (especially since not in has it's own bytecode?)
– mgilson
Apr 19 '13 at 4:07
...
Python str vs unicode types
Working with Python 2.7, I'm wondering what real advantage there is in using the type unicode instead of str , as both of them seem to be able to hold Unicode strings. Is there any special reason apart from being able to set Unicode codes in unicode strings using the escape char \ ?:
...
What is the id( ) function used for?
I read the Python 2 docs and noticed the id() function:
13 Answers
13
...
Python ValueError: too many values to unpack [duplicate]
...acked into the tuple "k, m", hence the ValueError exception is raised.
In Python 2.x, to iterate over the keys and the values (the tuple "k, m"), we use self.materials.iteritems().
However, since you're throwing the key away anyway, you may as well simply iterate over the dictionary's values:
for...
How do I log a Python error with debug information?
I am printing Python exception messages to a log file with logging.error :
12 Answers
...
Random strings in Python
How do you create a random string in Python?
13 Answers
13
...
APT command line interface-like yes/no input?
...ieve what the APT ( Advanced Package Tool ) command line interface does in Python?
19 Answers
...