dataframe column contains string
df[df['A'].str.contains("hello")]
dataframe column contains string
df[df['A'].str.contains("hello")]
pandas apply check for string length in column
df=pd.read_csv('filex.csv')
df.A=df.A.apply(lambda x: x if len(x)== 10 else np.nan)
df.B=df.B.apply(lambda x: x if len(x)== 10 else np.nan)
df=df.dropna(subset=['A','B'], how='any')
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