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Progress indicator during pandas operations
...iceably slow pandas down -- here's an example for DataFrameGroupBy.progress_apply:
import pandas as pd
import numpy as np
from tqdm import tqdm
# from tqdm.auto import tqdm # for notebooks
df = pd.DataFrame(np.random.randint(0, int(1e8), (10000, 1000)))
# Create and register a new `tqdm` instance...
How to make a class conform to a protocol in Swift?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Line continuation for list comprehensions or generator expressions in python
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Is there a math nCr function in python? [duplicate]
...
def nCr(n,r):
f = math.factorial
return f(n) / f(r) / f(n-r)
if __name__ == '__main__':
print nCr(4,2)
In Python 3, use the integer division // instead of / to avoid overflows:
return f(n) // f(r) // f(n-r)
Output
6
...
Very Long If Statement in Python [duplicate]
...to your code block.
For example:
if (abcdefghijklmnopqrstuvwxyz > some_other_long_identifier and
here_is_another_long_identifier != and_finally_another_long_name):
# ... your code here ...
pass
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Comparing two branches in Git? [duplicate]
I have two branches, branch_1 and branch_2 .
1 Answer
1
...
When and why should I use a namedtuple instead of a dictionary? [duplicate]
... to create a bunch of instances of a class like:
class Container:
def __init__(self, name, date, foo, bar):
self.name = name
self.date = date
self.foo = foo
self.bar = bar
mycontainer = Container(name, date, foo, bar)
and not change the attributes after you se...
Node.js, can't open files. Error: ENOENT, stat './path/to/file'
...eing called from.
To make a path relative to the script, you must use the __dirname variable.
var path = require('path');
path.join(__dirname, 'path/to/file')
or potentially
path.join(__dirname, 'path', 'to', 'file')
...
ModelSerializer using model property
...lizer class
class MyModelSerializer(serializers.ModelSerializer):
ext_link = serializers.Field()
class Meta:
model = MyModel
fields = ('name', 'ext_link')
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_access头文件_access头文件 #include #include <io.h>
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