Exchange Values of pandas DataFrame in Python (3 Examples)

import pandas as pd                                  # Import pandas

import pandas as pd # Import pandas

my_df = pd.DataFrame({'A':range(10, 15),            # Construct DataFrame in Python
                      'B':range(105, 100, - 1)})
print(my_df)                                        # Display DataFrame in Python
#     A    B
# 0  10  105
# 1  11  104
# 2  12  103
# 3  13  102
# 4  14  101

my_df = pd.DataFrame({'A':range(10, 15), # Construct DataFrame in Python 'B':range(105, 100, - 1)}) print(my_df) # Display DataFrame in Python # A B # 0 10 105 # 1 11 104 # 2 12 103 # 3 13 102 # 4 14 101

my_df.at[1, 'B'] = - 1                              # Modify DataFrame in Python
print(my_df)                                        # Display DataFrame in Python
#     A    B
# 0  10  105
# 1  11   -1
# 2  12  103
# 3  13  102
# 4  14  101

my_df.at[1, 'B'] = - 1 # Modify DataFrame in Python print(my_df) # Display DataFrame in Python # A B # 0 10 105 # 1 11 -1 # 2 12 103 # 3 13 102 # 4 14 101

my_df['A'] = my_df['A'].replace([10, 12, 14], - 2)  # Modify DataFrame in Python
print(my_df)                                        # Display DataFrame in Python
#     A    B
# 0  -2  105
# 1  11   -1
# 2  -2  103
# 3  13  102
# 4  -2  101

my_df['A'] = my_df['A'].replace([10, 12, 14], - 2) # Modify DataFrame in Python print(my_df) # Display DataFrame in Python # A B # 0 -2 105 # 1 11 -1 # 2 -2 103 # 3 13 102 # 4 -2 101

my_df.loc[my_df.B >= 103, 'B'] = - 3                # Modify DataFrame in Python
print(my_df)                                        # Display DataFrame in Python
#     A    B
# 0  -2   -3
# 1  11   -1
# 2  -2   -3
# 3  13  102
# 4  -2  101

my_df.loc[my_df.B >= 103, 'B'] = - 3 # Modify DataFrame in Python print(my_df) # Display DataFrame in Python # A B # 0 -2 -3 # 1 11 -1 # 2 -2 -3 # 3 13 102 # 4 -2 101