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How to convert list of tuples to multiple lists?
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From the python docs:
zip() in conjunction with the * operator can be used to unzip a list:
Specific example:
>>> zip((1,3,5),(2,4,6))
[(1, 2), (3, 4), (5, 6)]
>>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2...
How to get the ASCII value of a character
How do I get the ASCII value of a character as an int in Python ?
5 Answers
5
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Filter dict to contain only certain keys?
...Uses dictionary comprehension.
If you use a version which lacks them (ie Python 2.6 and earlier), make it dict((your_key, old_dict[your_key]) for ...). It's the same, though uglier.
Note that this, unlike jnnnnn's version, has stable performance (depends only on number of your_keys) for old_dicts...
How to fix Python indentation
I have some Python code that have inconsistent indentation. There is a lot of mixture of tabs and spaces to make the matter even worse, and even space indentation is not preserved.
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How to get POSTed JSON in Flask?
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For reference, here's complete code for how to send json from a Python client:
import requests
res = requests.post('http://localhost:5000/api/add_message/1234', json={"mytext":"lalala"})
if res.ok:
print res.json()
The "json=" input will automatically set the content-type, as discu...
How to strip all whitespace from string
How do I strip all the spaces in a python string? For example, I want a string like strip my spaces to be turned into stripmyspaces , but I cannot seem to accomplish that with strip() :
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Django: How to manage development and production settings?
...Django documentation:
The value of DJANGO_SETTINGS_MODULE should be in Python path syntax, e.g. mysite.settings. Note that the settings module should be on the Python import search path.
So, let's assume you created myapp/production_settings.py and myapp/test_settings.py in your source reposit...
How to return a part of an array in Ruby?
With a list in Python I can return a part of it using the following code:
6 Answers
6
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Why can't Python parse this JSON data?
...hen you should have {}:
[] are for JSON arrays, which are called list in Python
{} are for JSON objects, which are called dict in Python
Here's how your JSON file should look:
{
"maps": [
{
"id": "blabla",
"iscategorical": "0"
},
{
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What does “hashable” mean in Python?
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From the Python glossary:
An object is hashable if it has a hash value which never changes during its lifetime (it needs a __hash__() method), and can be compared to other objects (it needs an __eq__() or __cmp__() method). Hashab...