小文件

import hashlib
import base64

filePath = "test.txt"
with open(filePath, "rb") as f:
    fileData = f.read()
sha1 = hashlib.sha1()
sha1.update(fileData)
fileHash = base64.b64encode(sha1.digest()).decode('utf-8 ')
print(fileHash)
print(base64.b64decode(fileHash).hex())

在linux中，可以使用指令sha1sum test.txt验证

大文件

import hashlib
import base64

filePath = "test.txt"
sha1 = hashlib.sha1()
with open(filePath, "rb") as f:
    while True:
        fileData = f.read(2048)
        if not fileData:
            break
        sha1.update(fileData)
fileHash = base64.b64encode(sha1.digest()).decode('utf-8 ')
print(fileHash)
print(base64.b64decode(fileHash).hex())

参考: python 计算大文件的md5、sha1值