我需要一些帮助来将一些字符串/字符替换为文件。因为在我的Django DB中我有整数或字符串格式,我必须在导入之前首先自定义CSV。
因此,我需要在整个第8列和第9列中将字符-0-
替换为0
。在文件的其余部分,我需要将-0-
替换为" null"。该文件的名称是sdn.csv,位于我的桌面C:\Users\icohen\Desktop\
Number Name B/I Program More Info Vessel CallSign Vessel Type Vessel DWT (Deadweight tonnage) Gross Registered Tonnage Vessel Flag Vessel Owner DOB/AKA
36 AEROCARIBBEAN AIRLINES -0- CUBA -0- -0- -0- -0- -0- -0- -0- -0-
173 ANGLO-CARIBBEAN CO., LTD. -0- CUBA -0- -0- -0- -0- -0- -0- -0- -0-
这是我使用的代码:
import csv
file = '/Users/cohen/Desktop/sdn-2.csv'
newstring = "null"
newinteger = 0
with open(file, 'r+') as f:
for row in csv.reader(f):
if row[7] =="-0-":
row[7] = newinteger
if row[8] == "-0-":
row[8] = newinteger
f.close()
提前谢谢!
答案 0 :(得分:1)
对于像我这样的其他新手,这是我的解决方案。
import csv
newstring = "null"
newinteger = (0)
with open('/Users/cohen/Desktop/sdn-4 2.csv', 'r') as file1, open('/Users/cohen/Desktop/new_sdn.csv', 'w', newline='') as file2:
reader = csv.reader(file1, delimiter=',')
writer = csv.writer(file2, delimiter=',')
for row in reader:
replaced1 = row[7].replace('-0-', newstring)
row[7]=replaced1
replaced2 = row[8].replace('-0-', newinteger)
row[8]=replaced2
writer.writerow(row)