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How to install multiple python packages at once using pip
I know it's an easy way of doing it but i didn't find it neither here nor on google.
So i was curious if there is a way to install multiple packages using pip.
Something like:
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Python decorators in classes
...set_name(self, new_name):
self.name = new_name
Output (tested on Python 2.7.10):
>>> a = Thing('A')
>>> a.name
'A'
>>> a.set_name('B')
self.name = A
running function set_name()
self.name = B
>>> a.name
'B'
The example above is silly, but it works.
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How to check if a file is a valid image file?
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I have just found the builtin imghdr module. From python documentation:
The imghdr module determines the type
of image contained in a file or byte
stream.
This is how it works:
>>> import imghdr
>>> imghdr.what('/tmp/bass')
'gif'
Using a module...
How to execute XPath one-liners from shell?
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One package that is very likely to be installed on a system already is python-lxml. If so, this is possible without installing any extra package:
python -c "from lxml.etree import parse; from sys import stdin; print '\n'.join(parse(stdin).xpath('//element/@attribute'))"
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Can Selenium Webdriver open browser windows silently in background?
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If you are using Selenium web driver with Python,you can use PyVirtualDisplay, a Python wrapper for Xvfb and Xephyr.
PyVirtualDisplay needs Xvfb as a dependency. On Ubuntu, first install Xvfb:
sudo apt-get install xvfb
then install PyVirtualDisplay from Pypi:
pi...
import module from string variable
...ffers from MPL own provided, by interested submodule packages. I'm writing Python script which I hope will automate document generation from future MPL releases.
I selected interested submodules/packages and want to list their main classes from which I'll generate list and process it with pydoc ...
Split Strings into words with multiple word boundary delimiters
...word character (a-z etc.) repeated one or more times". There's a HOWTO on Python regular expressions here: amk.ca/python/howto/regex
– RichieHindle
Jul 4 '09 at 19:44
334
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Encrypt & Decrypt using PyCrypto AES 256
... IV.
iv = Random.new().read(AES.block_size)
# Convert the IV to a Python integer.
iv_int = int(binascii.hexlify(iv), 16)
# Create a new Counter object with IV = iv_int.
ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
# Create AES-CTR cipher.
aes = AES.new(...
JSON serialization of Google App Engine models
...r strings and integers for me so far: developers.google.com/appengine/docs/python/datastore/… So I'm not sure you need to reinvent the wheel to serialize to json: json.dumps(db.to_dict(Photo))
– gentimouton
Jul 5 '12 at 22:49
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TypeError: ObjectId('') is not JSON serializable
... back from MongoDB after querying an aggregated function on document using Python, It returns valid response and i can print it but can not return it.
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