大约有 45,000 项符合查询结果（耗时：0.0590秒） [XML]
python dataframe pandas drop column using int
I understand that to drop a column you use df.drop('column name', axis=1). Is there a way to drop a column using a numerical index instead of the column name?
...
Rank items in an array using Python/NumPy, without sorting array twice
...
11 Answers
11
Active
...
How to convert a boolean array to an int array
...
176
Numpy arrays have an astype method. Just do y.astype(int).
Note that it might not even be ne...
How can I pass arguments to a batch file?
...
17 Answers
17
Active
...
Get column index from column name in python pandas
...
Sure, you can use .get_loc():
In [45]: df = DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": [3,4,5]})
In [46]: df.columns
Out[46]: Index([apple, orange, pear], dtype=object)
In [47]: df.columns.get_loc("pear")
Out[47]: 2
although to be honest I don't often need this myself. U...
MySql: Tinyint (2) vs tinyint(1) - what is the difference?
I knew boolean in mysql as tinyint (1) .
4 Answers
4
...
Find row where values for column is maximal in a pandas DataFrame
...,columns=['A','B','C'])
>>> df
A B C
0 1.232853 -1.979459 -0.573626
1 0.140767 0.394940 1.068890
2 0.742023 1.343977 -0.579745
3 2.125299 -0.649328 -0.211692
4 -0.187253 1.908618 -1.862934
>>> df['A'].argmax()
3
>>> df['B'].argmax()
4
>...
Binary search (bisection) in Python
...on a list/tuple and return the position of the item if found and 'False' (-1, None, etc.) if not?
20 Answers
...
how to calculate binary search complexity
...
14 Answers
14
Active
...