添加测试文件

src/tran_excel2utf8.py

+import os
+import pandas as pd
+
+
+def main(infile):
+    outfile = infile.replace(".xlsx", "_result.csv")
+    df = pd.read_excel(infile, header=None) 
+    # df.to_excel(outfile, header=False, index=False, encoding="utf_8_sig", engine='xlsxwriter')
+    df.to_csv(outfile, header=False, index=False, encoding="utf_8_sig")
+
+
+if __name__ == "__main__":
+    infile = 'data/city.xlsx'
+    main(infile)