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Delete the first three rows of a dataframe in pandas
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281
Use iloc:
df = df.iloc[3:]
will give you a new df without the first three rows.
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In-place edits with sed on OS X
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291
You can use the -i flag correctly by providing it with a suffix to add to the backed-up file. ...
Copy array items into another array
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Use the concat function, like so:
var arrayA = [1, 2];
var arrayB = [3, 4];
var newArray = arrayA.concat(arrayB);
The value of newArray will be [1, 2, 3, 4] (arrayA and arrayB remain unchanged; concat creates and returns a new array for the result).
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Colors with unix command “watch”?
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edited May 23 '17 at 12:25
Community♦
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answered Sep 25 '10 at 14:37
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Loop backwards using indices in Python?
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nerak99
58255 silver badges2020 bronze badges
answered May 15 '09 at 17:20
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How can I permanently enable line numbers in IntelliJ?
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Python: access class property from string [duplicate]
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280
x = getattr(self, source) will work just perfectly if source names ANY attribute of self, incl...
How to remove a key from a Python dictionary?
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3072
To delete a key regardless of whether it is in the dictionary, use the two-argument form of dict...
How to write a switch statement in Ruby
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24 Answers
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