pandas filter by row value code example

Example 1: only keep rows of a dataframe based on a column value

df.loc[df['column_name'] == some_value]

Example 2: pandas filter rows by value in list

df.loc[df['col name'].isin(ls_conditions)]

Example 3: only keep rows of a dataframe based on a column value

df.loc[(df['column_name'] >= A) & (df['column_name'] <= B)]

Example 4: pandas filter rows by value

# does year equals to 2002?
# is_2002 is a boolean variable with True or False in it
>is_2002 =  gapminder['year']==2002
>print(is_2002.head())
0    False
1    False
2    False
3    False
4    False
# filter rows for year 2002 using  the boolean variable
>gapminder_2002 = gapminder[is_2002]
>print(gapminder_2002.shape)
(142, 6)