python3过大数据如何读取？

python中读取大文件的方法：

1、利用yield生成器读取

def readPart(filePath, size=1024, encoding="utf-8"):
    with open(filePath,"r",encoding=encoding) as f:
        while True:
            part = f.read(size)  
            if part:
                yield part
            else:
                return None
filePath = r"filePath"
size = 2048 # 每次读取指定大小的内容到内存
encoding = 'utf-8'
for part in readPart(filePath,size,encoding):
    print(part)
    # Processing data

2、利用open()自带方法生成迭代对象，这个是一行一行的读取

with open(filePath) as f:
    for line in f:
        print(line)
        # Processing data

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