将term文本转为整数

def solve():
    from pyodide.http import open_url
    from io import StringIO
    loans_raw_csv = open_url("https://data.zuihe.com/dbd/riskctrl/state_02/loans_raw.csv").read()
    loans_clean_csv = open_url("https://data.zuihe.com/dbd/riskctrl/state_02/loans_clean.csv").read()
    import pandas as pd
    from io import StringIO
    df = pd.read_csv(StringIO(loans_raw_csv))
    print("转换前:")
    print(df['term'].value_counts().to_string())
    df['term_num'] = df['term'].astype(str).str.extract(r'(\d+)').astype(float).astype('Int64')
    print("转换后:")
    print(df['term_num'].value_counts().to_string())