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Change column type from string to float in Pandas
...ul).
infer_objects() - a utility method to convert object columns holding Python objects to a pandas type if possible.
convert_dtypes() - convert DataFrame columns to the "best possible" dtype that supports pd.NA (pandas' object to indicate a missing value).
Read on for more detailed explanatio...
What is BSON and exactly how is it different from JSON?
...va.util.Date. Transmitting BSON looks like this in, for example, Java and python:
Java:
import org.bson.*;
MyObject --> get() from MyObject, set() into org.bson.Document --> org.bson.standardCodec.encode(Document) to byte[]
XMIT byte[]
python:
import bson
byte[] --> bson.decode(byte[])...
How to assign the output of a command to a Makefile variable
I need to execute some make rules conditionally, only if the Python installed is greater than a certain version (say 2.5).
...
Saving interactive Matplotlib figures
...ckle
pickle.dump(fig, open('FigureObject.fig.pickle', 'wb')) # This is for Python 3 - py2 may need `file` instead of `open`
Later, open the figure and the tweaks should be saved and GUI interactivity should be present:
import pickle
figx = pickle.load(open('FigureObject.fig.pickle', 'rb'))
figx....
Allowed characters in Linux environment variable names
...ME COMMAND
1 root 0:00 /bin/sh
12 root 0:00 ps aux
Use python to verify environemnt variable
apk add python
python -c 'import os; print(os.environ["spring.application_name"])'
OUTPUT is happy-variable-name.
What happen?
Shell call builtin exec
Shell builtin exec call syscal...
How do I access the command history from IDLE?
...dentally, why don't you try a better (less ugly, for starters) shell like bpython or ipython?
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nosetests is capturing the output of my print statements. How to circumvent this?
...
python3.5 -m "nose" --nocapture
– Alex Punnen
Mar 19 '18 at 9:24
1
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Sort a list by multiple attributes?
...Or you can achieve the same using itemgetter (which is faster and avoids a Python function call):
import operator
s = sorted(s, key = operator.itemgetter(1, 2))
And notice that here you can use sort instead of using sorted and then reassigning:
s.sort(key = operator.itemgetter(1, 2))
...
Remove the first character of a string
...
python 2.x
s = ":dfa:sif:e"
print s[1:]
python 3.x
s = ":dfa:sif:e"
print(s[1:])
both prints
dfa:sif:e
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sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 1, and t
... treated as the input sequence. If that string is 74 characters long, then Python sees that as 74 separate bind values, each one character long.
>>> len(img)
74
>>> len((img,))
1
If you find it easier to read, you can also use a list literal:
cursor.execute('INSERT INTO images ...