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Create an empty list in python with certain size
...None] * 10
for i in range(10):
lst[i] = i
Admittedly, that's not the Pythonic way to do things. Better do this:
lst = []
for i in range(10):
lst.append(i)
Or even simpler, in Python 2.x you can do this to initialize a list with values from 0 to 9:
lst = range(10)
And in Python 3.x:
...
Difference between a View's Padding and Margin
...e it more clear, here is a picture of padding and margin in a TextView:
xml layout for the image above
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match...
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...
Least common multiple for 3 or more numbers
...
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."""
...
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.
...
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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How to print a query string with parameter values when using Hibernate
...
Change hibernate.cfg.xml to:
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="use_sql_comments">true</property>
Include log4j and below entries in "log4j....
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.
...
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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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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