- A really important thing you will need to be able to do is read and write text files with variable numbers of lines
- Because we don’t know how many lines there will be, we tend to read text files into a list, make any changes, and then write the whole list back over the file
#Define blank list
file_contents = []
#Open the file
file = open("addresses.csv","r")
#Loop through each line
for line in file:
#Strip the \n fron the line
line = line.strip("\n")
#Split the line into parts
name,address,city,phone = line.split(",")
#Add items to file_contents list
file_contents.append([name,address,city,phone])
#Close the file
file.close()
#Messy print
print(file_contents)Tasks
- Type in the code and make sure it works
- Modify the code to allow you to choose a filename
- Modify the code to print the list in a neater fashion
- Save and label your code
Extension Task
You can make this code more efficient by combining the splitting and appending into one line (shown below). Implement this improvement
file_contents.append(line.split(","))