Python:如何将所有记录写入/打印到文件中

Question

我有代码从 Excel 电子表格读取数据，然后对数据执行一些简单的转换，并将结果保存到文本文件中。

除了一个问题之外，一切正常 - 我只能看到最后一条记录。 似乎循环覆盖所有记录... 如何获取所有记录？

from openpyxl import load_workbook
# The source xlsx file is named as source.xlsx
wb=load_workbook("/home/test/Downloads/test.xlsx")
ws = wb.active
first_column =ws['A']
second_column =ws['B']
# Print the contents
for x in xrange(len(first_column)):
    A = str(first_column[x].value)
    B = str(second_column[x].value)
    C = str(len(B.split()))
    PRN = A+B+C
    file = open('filename', 'w')
    file.write(PRN)
    file.close()

Answer 1

只需对代码进行少量修改:-

PRN = A+B+C
    file = open('filename', 'a')
    file.write(PRN+"\n")
    file.close()