﻿ Pandas: Find the index of a given substring of a DataFrame column - w3resource # Pandas: Find the index of a given substring of a DataFrame column

## Pandas: String and Regular Expression Exercise-7 with Solution

Write a Pandas program to find the index of a given substring of a DataFrame column.

Sample Solution:

Python Code :

``````import pandas as pd
df = pd.DataFrame({
'name_code': ['c001','c002','c022', 'c2002', 'c2222'],
'date_of_birth ': ['12/05/2002','16/02/1999','25/09/1998','12/02/2022','15/09/1997'],
'age': [18.5, 21.2, 22.5, 22, 23]
})
print("Original DataFrame:")
print(df)
print("\nCount occurrence of 22 in date_of_birth column:")
df['Index'] = list(map(lambda x: x.find('22'), df['name_code']))
print(df)
``````

Sample Output:

```Original DataFrame:
name_code date_of_birth    age
0      c001     12/05/2002  18.5
1      c002     16/02/1999  21.2
2      c022     25/09/1998  22.5
3     c2002     12/02/2022  22.0
4     c2222     15/09/1997  23.0

Count occurrence of 22 in date_of_birth column:
name_code date_of_birth    age  Index
0      c001     12/05/2002  18.5     -1
1      c002     16/02/1999  21.2     -1
2      c022     25/09/1998  22.5      2
3     c2002     12/02/2022  22.0     -1
4     c2222     15/09/1997  23.0      1
```

Python Code Editor:

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## Python: Tips of the Day

Returns all the elements of a list except the last one

Example:

```def tips_initial(lst):
return lst[0:-1]

print(tips_initial([1, 2, 3, 4]))
```

Output:

```[1, 2, 3]
```