如何仅删除包含特定关键字的一行？ 并将该行保存到另一个文件中

Question

fileHandler = editFile(warehouse,'r')
fileHandler2 = open('provided_parts.txt','w')

Here I am prompting user to select the part name from a number list, and then retrieving the part name

output = []
for part in range(quantityOfParts):
    part = partSelection()
    partName = partsList[part-1]

This section doesn't seem to be working, I am trying to only delete one line in .txt file that contains the part name, and then saving that line into another file ( fileHandler2 )

for line in fileHandler:
    line = line.rstrip()
    newLine = line.split('\t')
    if partName.lower() == newLine[0].lower():
        fileHandler2.write(newLine[0])
        fileHandler2.write('\n')
        newLine[0] = '\t'
    output.append(newLine)

fileHandler.close()
fileHandler2.close()

fHand = editFile(warehouse,'w')

for part in output:
    for p in part:
        fHand.write(p)
        fHand.write('\t')
    fHand.write('\n')

fHand.close()

Answer 1

The example below implies that specific word is wrapped by spaces. if you want it to be case-sensitive, remove .lower()

line_to_be_deleted = "Hello"

fileHandler = open(warehouse, 'rw')
fileHandler2 = open('provided_parts.txt','w')

fileHandler_lines = fileHandler.readlines()
for line in fileHandler_lines:
    # write all lines except one that should be removed
    if line_to_be_deleted.lower() not in line.strip('\n').lower():
        fileHandler.write(line)
    else:
        # then write removed line into second file
        fileHandler2.write(line)

# do not forget to close files
fileHandler.close()
fileHandler2.close()

References