f = open("yesterday",'r',encoding="utf-8")  # 檔案控制代碼
print(f.readline())
print(f.readline())
print(f.readline())
print(f.readline())
print(f.readline())

f = open("yesterday",'r',encoding="utf-8")  # 檔案控制代碼
for i in range(5):
    print
 
(f.readline())

f = open("yesterday",'r',encoding="utf-8")  # 檔案控制代碼
print(f.readline())

f = open("yesterday",'r',encoding="utf-8")  # 檔案控制代碼
for line in f.readlines():
    print(line)

f = open("
 
yesterday",'r',encoding="utf-8")  # 檔案控制代碼
for line in f.readlines():
    print(line.strip())
# 第 10 行 不列印 怎麼寫？
# low loop
f = open("yesterday",'r',encoding="utf-8")  # 檔案控制代碼
for index,line in enumerate(f.readlines()):
    if index == 9:
        print('----- 我是分割線 -----')
        continue
    print(line.strip())

# high bige
for line in f:
    print(line)
# 這個效率是最高的，因為 f 已經被變成了 迭代器
# 現在他不是列表了，所以，需要弄一個計數器。
count = 0
for line in f:
    if count == 9:
        print('----我是分割線----')
        count += 1
        continue
    print(line)
    count += 1