Answers for "pandas get item by index"

5

finding the index of an element in a pandas df

In [48]: a
Out[48]: 
   c1  c2
0   0   1
1   2   3
2   4   5
3   6   7
4   8   9

In [49]: a.c1[a.c1 == 8].index.tolist()
Out[49]: [4]
Posted by: Guest on September-18-2020
0

finding the index of an item in a pandas df

print(df[df['Name']=='Donna'].index.values)
Posted by: Guest on October-01-2020
2

pandas df by row index

indices = [133, 22, 19, 203, 14, 1]
df_by_indices = df.iloc[indices, :]
Posted by: Guest on October-22-2020
0

add an index column in range dataframe

df = df.loc[df.index.repeat(df['a'])]   
df['c'] = df.groupby(level=0).cumcount() + 1
df = df.reset_index(drop=True)
print (df)
   a  b  c
0  1  x  1
1  2  y  1
2  2  y  2
3  3  z  1
4  3  z  2
5  3  z  3
Posted by: Guest on November-06-2020

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