How to check if the column name is at the last or in the front of a string (python)?

I am new to pandas. I have an issue with knowing where the column is in last or first inside a string. For suppose I have a string str = "000*999bikes" where the bikes is a column name of df, now I want to check the position of the column whether it is in the first or last

My code:

str = "000*999bikes"
df =
  bikes cars
0  12    23
1  34    67
3  56    90

Now the column name bikes is in last of a string. How to know if it is in the last using if condition?

Solution

If you just want the number beside the column name, you can use the following code to check for each column.

import pandas as pd

df = pd.DataFrame([[1,2],[2,2]],columns=['bikes','cars'])

strings = ["cars000*999","000*999bikes"]

for s in strings:
    for col in df.columns:
        if s.startswith(col):
            print(col, s[len(col) + 1])
        if s.endswith(col):
            print(col, s[-len(col) - 1])

Output:

cars 0
bikes 9

If your strings are in the dataframe then you could do this with pandas str operations instead of loops.