Study Notes (17): 21 days clearance Python (Video Lesson only) - Case practical operation: by reading the file line

Learning immediately: https://edu.csdn.net/course/play/24797/282197?utm_source=blogtoedu

# ReadLine while loop to read all rows 
# the try: 
# F = Open ( 'test44.py', 'R & lt', True, 'UTF-. 8') 
# the while True: 
# = f.readline Data () 
# Data Not IF : 
# BREAK 
# Print (Data, End = '') 
# AS OSError the except E: 
# Print (E) 
# Print (e.errno) 
# Print (e.args) 
# Print (e.strerror) 
# the finally: 
# IF 'F' in Globals (): 
# f.close () 

# readLines cycles to read all rows 
# the try: 
# F = Open ( 'test44.py', 'R & lt', True, 'UTF-. 8') 
# # returns is a list 
# = f.readlines Data () 
# Data for I in:  
# Print (I, End = '')
# Print (Data, End = '')
# except OSError as e:
#     print(e)
#     print(e.errno)
#     print(e.args)
#     print(e.strerror)
# finally:
#     if 'f' in globals():
#         f.close()

# for 方法 读取所有数据
# try:
#     f = open('test44.py', 'r', True, 'utf-8')
#     for i in f:
#         print(i,end='')
# except OSError as e:
#     print(e)
#     print(e.errno)
#     print(e.args)
#     print(e.strerror)
# finally:
#     if 'f' in globals():
#         f.close()

# lincache.getline
# import linecache
# try:
#     #data = linecache.getline('test44.py',10)
#     data = linecache.getlines('test44.py')
#     print(data)
#     for i in data:
#         print(i,end='')
# except:
#     print('出现问题了')

# lincache.getline
import linecache

try:
    # data = linecache.getline('test44.py',10)
    data = linecache.getlines(linecache.__file__)
    print(data)
    for i in data:
        print(i, end='')
except:
    print('出现问题了')