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DtypeWarning: Columns (47) have mixed types.Specify dtype option on import or set low_memory=False

dashboard_df = pd.read_csv(p_file, sep=',', error_bad_lines=False, index_col=False, dtype='unicode')
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DtypeWarning: Columns (7) have mixed types. Specify dtype option on import or set low_memory=False

def convert_dtype(x):
    if not x:
        return ''
    try:
        return str(x)   
    except:        
        return ''

pd.read_csv('file.csv',converters={'first_column': convert_dtype,'second_column': convert_dtype})
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