从 csv 文件中的字符串中提取特定信息

Question

Little backstory first. I got a script that downloads and opens a .csv file and reads the content. The part of the script i got a problem with is below.

file = Download_Folder + str(attachment)
print (file + " is active")
file = open(file, 'r')
for line in file:
 if "WOD" in line:
  print(WOD)

The problem I got is that every line is between 500 - 1000 characters and I only want the script to return some of them. I can't use slicing since the numbers of characters before and after my information is different for every line. Below is an example line.

2020-01-15 07:05:59 CET;ORD007_PickListReport;'7000009569 7000009494 7000009867 7000009364 7000009808 7000009260;Finished;WOD0200115070558117;884ee259-f2ba-48c6-8ef8-39fc6e48805b

I want the script to find 3 characters ("WOD") in the line string and print them and the 16 characters after. Then go and scan the next line in a loop.

Answer 1

Use the string index() method:

for line in file:
    try:
        index = line.index("WOD", 0, len(line))
        print(line[index:(index + 17)])
    except ValueError:
        continue