Python 파일 내 키워드 찾아서 라인 출력하기

 

# file read searchfile = open("file.txt", "r")   # line search for line in searchfile: # if 499 is contained in this line     if "499" in line: print line searchfile.close()  ==> main function을 넣어 좀 보기 좋게 만들기 def main():     searchfile = open("file.txt", "r")     for line in searchfile:         if "499" in line:             print line     searchfile.close() if __name__ == "__main__":     main()

 

멀티플 라인 출력

f = open("file.txt", "r") searchlines = f.readlines() f.close() for i, line in enumerate(searchlines):     if "499" in line:          for l in searchlines[i:i+3]: print l,         print

 

 

with open("file.txt", "r") as f:     searchlines = f.readlines() for i, line in enumerate(searchlines):     if "499" in line:          for l in searchlines[i:i+3]: print l,         print

 

 

with open('file.txt', 'r') as searchfile:     for line in searchfile:         if '499' in line:             print line