共同點：均可接受一個變數用以限制每次讀取的資料量，但通常不使用
區別：
read() 【即 fileObject().read( [size] ) 】
特點：讀取整個檔案，將檔案內容放在一個字串變數中，
劣勢：如果檔案非常大，尤其大于記憶體時，無法使用read()方法，
with open(r'../learn_file/file_to_read.txt', encoding='utf-8', mode='r') as fb:
content = fb.read()
print(type(content))
print(content)
# 輸出：
# <class 'str'>
# line 1: Hello, Mike.
# line 2: Nice to meet you. I'm Nick.
# line 3: Welcome to Shenzhen.
# line 4: Thx, it is really a beautiful city. I enjoy my time here.
# line 5: It is. Shall we go for some coffee this afternoon.
# line 6：Sure. And I want to discuss some details about the project we're going to work for
readline() 【即 fileObject.readline( [size] )，[size]表示可選引數，】
特點：從檔案中一行一行地整行讀取資料，如果指定了一個非負數的引數，則回傳指定大小的位元組數，
缺點：比readlines()慢得多
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with open(r'../learn_file/file_to_read.txt', encoding='UTF-8', mode='r+') as fb:
while True:
content = fb.readline().replace('\n', '')
# content = fb.readlines()
# if not content:
# break
if content:
print(type(content), content)
else:
break
# print(type(content))
# print(type(content), content)
print(fb.name)
# 輸出：
# <class 'str'> line 1: Hello, Mike.
# <class 'str'> line 2: Nice to meet you. I'm Nick.
# <class 'str'> line 3: Welcome to Shenzhen.
# <class 'str'> line 4: Thx, it is really a beautiful city. I enjoy my time here.
# <class 'str'> line 5: It is. Shall we go for some coffee this afternoon.
# <class 'str'> line 6：Sure. And I want to discuss some details about the project we're going to work for.
# ../learn_file/file_to_read.txt
readlines() 【即 fileObject.readlines( [sizeint] )，[sizeint] 表示可選引數】
特點：從檔案一次讀取所有行并回傳串列，若給定sizeint > 0，回傳總和大約為sizeint位元組的行
with open(r'../learn_file/file_to_read.txt', encoding='utf-8', mode='r') as fb:
content = fb.readlines()
print(type(content))
for line in content:
print(type(line), line.replace('\n', ''))
# 輸出
# <class 'list'>
# <class 'str'> line 1: Hello, Mike.
# <class 'str'> line 2: Nice to meet you. I'm Nick.
# <class 'str'> line 3: Welcome to Shenzhen.
# <class 'str'> line 4: Thx, it is really a beautiful city. I enjoy my time here.
# <class 'str'> line 5: It is. Shall we go for some coffee this afternoon.
# <class 'str'> line 6：Sure. And I want to discuss some details about the project we're going to work for.
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