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PowerShell equivalent to grep -f
... What I like about this answer is that findstr works the most like grep on Linux does. Select-String is great for working with objects, but sometimes you just want to match on strings.
– Elijah W. Gagne
Dec 27 '16 at 21:34
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Logical operators for boolean indexing in Pandas
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When you say
(a['x']==1) and (a['y']==10)
You are implicitly asking Python to convert (a['x']==1) and (a['y']==10) to boolean values.
NumPy arrays (of length greater than 1) and Pandas objects such as Series do not have a boolean value -- in other words, they raise
ValueError: The truth v...
How to replace multiple substrings of a string?
...he replacement
rep = dict((re.escape(k), v) for k, v in rep.iteritems())
#Python 3 renamed dict.iteritems to dict.items so use rep.items() for latest versions
pattern = re.compile("|".join(rep.keys()))
text = pattern.sub(lambda m: rep[re.escape(m.group(0))], text)
For example:
>>> patte...
How to create a density plot in matplotlib?
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@Justin Nice answer (+1) and not wanting to start any Python v R flame wars or anything, but I am loving the way R works with data much more succinctly that python and other languages. I'm sure python has lots of good points over R (I'm not a Python user so I'm so totally unifor...
How to properly use unit-testing's assertRaises() with NoneType objects? [duplicate]
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If you are using python2.7 or above you can use the ability of assertRaises to be use as a context manager and do:
with self.assertRaises(TypeError):
self.testListNone[:1]
If you are using python2.6 another way beside the one given unt...
Convert MySQL to SQlite [closed]
...c database differences away for you. e.g. you get these in PHP (RedBean), Python (Django's ORM layer, Storm, SqlAlchemy), Ruby on Rails (ActiveRecord), Cocoa (CoreData) etc.
i.e. you could do this:
Load data from source database using the ORM class.
Store data in memory or serialize to disk.
Sto...
Python try-else
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There's no such thing as a "try-scoped variable". In Python, variable scopes are established only by modules, functions and comprehensions, not control structures.
– mhsmith
Apr 11 '15 at 12:59
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AttributeError: 'module' object has no attribute
I have two python modules:
14 Answers
14
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How do I package a python application to make it pip-installable?
...ble app
And here's another good, detailed overview that helped me a lot:
Python Packaging User Guide
Especially the tips to get your static files (templates) included are important as this might not be obvious at first.
And yes, you can specify required packages in your setup.py which are automa...
Google Authenticator implementation in Python
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for python 3: change: ord(h[19]) & 15 into : o = h[19] & 15 Thanks BTW
– Orville
Apr 18 '19 at 12:04
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