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Renaming columns in pandas
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Use the df.rename() function and refer the columns to be renamed. Not all the columns have to be renamed:
df = df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'})
# Or rename the existing DataFrame (rather than creating a copy)
df.rename(columns={'oldName1': 'newName1', 'oldNam...
load scripts asynchronously
...time to load. it will be nice if I can display the loader before importing all the:
19 Answers
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How do I find out what keystore my JVM is using?
...les---> JAVA_HOME
Your server startup batch files.
In your import command -keystore cacerts (give full path to the above JRE here instead of just saying cacerts).
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ActionController::InvalidAuthenticityToken
...h were page cached. Pages got buffered with a stale authenticity token and all actions using the methods post/put/delete where recognized as forgery attempts. Error (422 Unprocessable Entity) was returned to the user.
The solution for Rails 3:
Add:
skip_before_filter :verify_authenticity_token
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How to log PostgreSQL queries?
How to enable logging of all SQL executed by PostgreSQL 8.3?
10 Answers
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Scala list concatenation, ::: vs ++
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++ is also easy to mix up with +:
scala> List(1, 2, 3) + "ab"
res1: String = List(1, 2, 3)ab
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How can I open a link in a new window?
I have a click handler for a specific link, inside that I want to do something similar to the following:
10 Answers
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How can I represent an infinite number in Python?
...NEVER use it unless absolutely necessary):
None < any integer < any string
Thus the check i < '' holds True for any integer i.
It has been reasonably deprecated in python3. Now such comparisons end up with
TypeError: unorderable types: str() < int()
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How to update Python?
I have version 2.7 installed from early 2012. I can't find any consensus on whether I should completely uninstall and wipe this version before putting on the latest version.
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Permanently add a directory to PYTHONPATH?
...n environment variable in your chosen platform and shell, since it's not really a programming question per se.
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