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Pythonic way to check if a file exists? [duplicate]
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This answer is outdated. On Python 3.4+ use pathlib, like this: Path("path/to/file").is_file() if you want to check that it's a file and that it exists or Path("path/to/file").exists() if you only want to know that it exists (but might be a directory).
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Get __name__ of calling function's module in Python
...ller's function name, module, etc.
See the docs for details:
http://docs.python.org/library/inspect.html
Also, Doug Hellmann has a nice writeup of the inspect module in his PyMOTW series:
http://pymotw.com/2/inspect/index.html#module-inspect
EDIT: Here's some code which does what you want, I th...
Is there a version control system for database structure changes?
...k for nearly every database which supports jdbc. Compared to rails it uses xml instead ruby to perform the schema changes. Although I dislike xml for domain specific languages the very cool advantage of xml is that liquibase knows how to roll back certain operations like
<createTable tableName=...
str performance in python
While profiling a piece of python code ( python 2.6 up to 3.2 ), I discovered that the
str method to convert an object (in my case an integer) to a string is almost an order of magnitude slower than using string formatting.
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Least common multiple for 3 or more numbers
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In Python (modified primes.py):
def gcd(a, b):
"""Return greatest common divisor using Euclid's Algorithm."""
while b:
a, b = b, a % b
return a
def lcm(a, b):
"""Return lowest common multiple."""
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How to append multiple values to a list in Python
I am trying to figure out how to append multiple values to a list in Python. I know there are few methods to do so, such as manually input the values, or put the append operation in a for loop, or the append and extend functions.
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Fast way of counting non-zero bits in positive integer
I need a fast way to count the number of bits in an integer in python.
My current solution is
9 Answers
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Circular list iterator in Python
... pool.next() didn't work for me, only next(pool). Probably because of Python 3?
– fjsj
Aug 21 '15 at 15:23
6
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Do python projects need a MANIFEST.in, and what should be in it?
The "Python Distribute" guide (was at python-distribute.org, but that registration has lapsed) tells me to include doc/txt files and .py files are excluded in MANIFEST.in file
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Post JSON using Python Requests
I need to POST a JSON from a client to a server. I'm using Python 2.7.1 and simplejson. The client is using Requests. The server is CherryPy. I can GET a hard-coded JSON from the server (code not shown), but when I try to POST a JSON to the server, I get "400 Bad Request".
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