大约有 7,000 项符合查询结果（耗时：0.0457秒） [XML]
How do I parse a string to a float or int?
In Python, how can I parse a numeric string like "545.2222" to its corresponding float value, 545.2222 ? Or parse the string "31" to an integer, 31 ?
...
Find the nth occurrence of substring in a string
This seems like it should be pretty trivial, but I am new at Python and want to do it the most Pythonic way.
21 Answers
...
Get unique values from a list in python [duplicate]
...f you need to maintain the set order there is also a library on PyPI: pypi.python.org/pypi/ordered-set
– Jace Browning
Sep 26 '13 at 1:12
7
...
Python hashable dicts
... an unneeded itermediate list -- fixable by s/items/iteritems/ -- assuming Python 2.* as you don't say;-).
– Alex Martelli
Jul 20 '09 at 4:48
5
...
Join a list of strings in python and wrap each string in quotation marks
...2: following @JCode's comment, adding a map to ensure that join will work, Python 2.7.12
>>> timeit.Timer("""words = ['hello', 'world', 'you', 'look', 'nice'] * 100; ', '.join('"{0}"'.format(w) for w in words)""").timeit(1000)
0.08646488189697266
>>> timeit.Timer("""words = ['hel...
log messages appearing twice with Python Logging
I'm using Python logging, and for some reason, all of my messages are appearing twice.
8 Answers
...
What is the difference between re.search and re.match?
...t is the difference between the search() and match() functions in the Python re module ?
8 Answers
...
Pythonic way to add datetime.date and datetime.time objects
...
It's in the python docs.
import datetime
datetime.datetime.combine(datetime.date(2011, 1, 1),
datetime.time(10, 23))
returns
datetime.datetime(2011, 1, 1, 10, 23)
...
Counting array elements in Python [duplicate]
...e usually "special methods" implementing one of the standard interfaces in Python (container, number, etc). Special methods are used via syntactic sugar (object creation, container indexing and slicing, attribute access, built-in functions, etc.).
Using obj.__len__() wouldn't be the correct way of...
How to dynamically build a JSON object with Python?
I am new to Python and I am playing with JSON data. I would like to dynamically build a JSON object by adding some key-value to an existing JSON object.
...