我的代码的目的是导入 2 个 Excel 文件，比较它们，并将差异打印到一个新的 Excel 文件。
但是，在连接所有数据并使用 drop_duplicates 函数后，代码被控制台接受。但是，当打印到新的 excel 文件时，重复项仍然保留在一天之内。
我错过了什么吗？是否有东西使 drop_duplicates 函数无效？
我的代码如下:
import datetime
import xlrd
import pandas as pd
#identify excel file paths
filepath = r"excel filepath"
filepath2 = r"excel filepath2"
#read relevant columns from the excel files
df1 = pd.read_excel(filepath, sheetname="Sheet1", parse_cols= "B, D, G, O")
df2 = pd.read_excel(filepath2, sheetname="Sheet1", parse_cols= "B, D, F, J")
#merge the columns from both excel files into one column each respectively
df4 = df1["Exchange Code"] + df1["Product Type"] + df1["Product Description"] + df1["Quantity"].apply(str)
df5 = df2["Exchange"] + df2["Product Type"] + df2["Product Description"] + df2["Quantity"].apply(str)
#concatenate both columns from each excel file, to make one big column containing all the data
df = pd.concat([df4, df5])
#remove all whitespace from each row of the column of data
df=df.str.strip()
df=["".join(x.split()) for x in df]
#convert the data to a dataframe from a series
df = pd.DataFrame({'Value': df})
#remove any duplicates
df.drop_duplicates(subset=None, keep="first", inplace=False)
#print to the console just as a visual aid
print(df)
#print the erroneous entries to an excel file
df.to_excel("Comparison19.xls")
最佳答案
你有 inplace=False，所以你没有修改 df。你想要一个
df.drop_duplicates(subset=None, keep="first", inplace=True)
或
df = df.drop_duplicates(subset=None, keep="first", inplace=False)
关于python - drop_duplicates 在 Pandas 中不起作用？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46489695/