change pandas column value based on condition

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Leo
06 Apr 2017
1In [41]:
2df.loc[df['First Season'] > 1990, 'First Season'] = 1
3df
4
5Out[41]:
6                 Team  First Season  Total Games
70      Dallas Cowboys          1960          894
81       Chicago Bears          1920         1357
92   Green Bay Packers          1921         1339
103      Miami Dolphins          1966          792
114    Baltimore Ravens             1          326
125  San Franciso 49ers          1950         1003
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