大约有 13,000 项符合查询结果（耗时：0.0319秒） [XML]
Python __str__ and lists
...
Calling string on a python list calls the __repr__ method on each element inside. For some items, __str__ and __repr__ are the same. If you want that behavior, do:
def __str__(self):
...
def __repr__(self):
return self.__str__()
...
Android preferences onclick event
In my preferences.xml I have a preference element like this:
5 Answers
5
...
How do I specify new lines on Python, when writing on files?
...ge. (It's actually called linesep.)
Note: when writing to files using the Python API, do not use the os.linesep. Just use \n; Python automatically translates that to the proper newline character for your platform.
share
...
Difference between exit(0) and exit(1) in Python
What's the difference between exit(0) and exit(1) in Python?
5 Answers
5
...
What is the Python equivalent of static variables inside a function?
What is the idiomatic Python equivalent of this C/C++ code?
26 Answers
26
...
Initializing a list to a known number of elements in Python [duplicate]
...
This way of initializing a Python array is evil: a=[[]]*2; a[0].append('foo'); now inspect a[1], and you will be shocked. In contrast a=[[] for k in range(2)] works fine.
– Joachim W
Aug 12 '13 at 21:40
...
Python import csv to list
...s the second line', 'Line2'), ('This is the third line', 'Line3')]
Old Python 2 answer, also using the csv module:
import csv
with open('file.csv', 'rb') as f:
reader = csv.reader(f)
your_list = list(reader)
print your_list
# [['This is the first line', 'Line1'],
# ['This is the secon...
What is the fastest way to check if a class has a function defined?
...
It works in both Python 2 and Python 3
hasattr(connection, 'invert_opt')
hasattr returns True if connection object has a function invert_opt defined. Here is the documentation for you to graze
https://docs.python.org/2/library/functions.h...
How can I remove non-ASCII characters but leave periods and spaces using Python?
...XYZ
!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c
EDIT: On Python 3, filter will return an iterable. The correct way to obtain a string back would be:
''.join(filter(lambda x: x in printable, s))
share
...
Invalid syntax when using “print”? [duplicate]
I'm learning Python and can't even write the first example:
4 Answers
4
...