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How to deal with SettingWithCopyWarning in Pandas?
...ticularly when the first selection returns a copy. [see GH5390 and GH5597 for background discussion.]
df[df['A'] > 2]['B'] = new_val # new_val not set in df
The warning offers a suggestion to rewrite as follows:
df.loc[df['A'] > 2, 'B'] = new_val
However, this doesn't fit your usage, w...
How can you make a custom keyboard in Android?
...ss variables that you have to create.
Then you need the following function for opening the keyboard ( you must associate it with the TextView through the onClick xml property)
public void openKeyboard(View v)
{
mKeyboardView.setVisibility(View.VISIBLE);
mKeyboardView.setEnabled...
Multi-line string with extra space (preserved indentation)
...
Heredoc sounds more convenient for this purpose. It is used to send multiple commands to a command interpreter program like ex or cat
cat << EndOfMessage
This is line 1.
This is line 2.
Line 3.
EndOfMessage
The string after << indicates wher...
How to pass a user defined argument in scrapy spider
...
Spider arguments are passed in the crawl command using the -a option. For example:
scrapy crawl myspider -a category=electronics -a domain=system
Spiders can access arguments as attributes:
class MySpider(scrapy.Spider):
name = 'myspider'
def __init__(self, category='', **kwargs):
...
How to generate keyboard events in Python?
...x), ctypes.sizeof(x))
def AltTab():
"""Press Alt+Tab and hold Alt key for 2 seconds
in order to see the overlay.
"""
PressKey(VK_MENU) # Alt
PressKey(VK_TAB) # Tab
ReleaseKey(VK_TAB) # Tab~
time.sleep(2)
ReleaseKey(VK_MENU) # Alt~
if __name__ == "__main__":
...
Get class name of django model
...e__.
Django models are derived from the ModelBase, which is the Metaclass for all models.
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Is generator.next() visible in Python 3?
I have a generator that generates a series, for example:
3 Answers
3
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How to decorate a class?
...ator to add a member to a class and change the constructor to take a value for that member.
8 Answers
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How do I get the number of elements in a list?
...several different types in Python - both built-in types and library types. For example:
>>> len([1,2,3])
3
Official 2.x documentation is here: len()
Official 3.x documentation is here: len()
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What is SYSNAME data type in SQL Server?
What is the SQL Server SYSNAME data type for? BOL says:
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