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pandas DataFrame: replace nan values with average of columns
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283
You can simply use DataFrame.fillna to fill the nan's directly:
In [27]: df
Out[27]:
...
How to use glob() to find files recursively?
...lib.Path.rglob from the the pathlib module, which was introduced in Python 3.5.
from pathlib import Path
for path in Path('src').rglob('*.c'):
print(path.name)
If you don't want to use pathlib, use can use glob.glob('**/*.c'), but don't forget to pass in the recursive keyword parameter and it ...
What's the difference between VARCHAR and CHAR?
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372
VARCHAR is variable-length.
CHAR is fixed length.
If your content is a fixed size, you'll ge...
how to convert array values from string to int?
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edited Apr 23 '19 at 10:46
Rahul
16.8k77 gold badges3434 silver badges5353 bronze badges
a...
Group by multiple columns in dplyr, using string vector input
...e so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE),
value = rnorm(100)
)
# get the columns we want to average within
columns = names(data)[-3]
library(dplyr)
df1 <- data %...
How do I loop through a list by twos? [duplicate]
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392
You can use for in range with a step size of 2:
Python 2
for i in xrange(0,10,2):
print(i)...
Immutable vs Mutable types
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233
What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mut...
Javascript reduce on array of objects
...a variable in the next iteration.
Iteration 1: a = {x:1}, b = {x:2}, {x: 3} assigned to a in Iteration 2
Iteration 2: a = {x:3}, b = {x:4}.
The problem with your example is that you're returning a number literal.
function (a, b) {
return a.x + b.x; // returns number literal
}
Iteration 1: ...
nonlocal keyword in Python 2.x
...turn d['y']
return inner
f = outer()
print(f(), f(), f()) #prints 1 2 3
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Call a function with argument list in python
... func(*args)
def func2(x, y, z):
print x+y+z
wrapper1(func2, 1, 2, 3)
wrapper2(func2, [1, 2, 3])
In wrapper2, the list is passed explicitly, but in both wrappers args contains the list [1,2,3].
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