pickle 有dump ,dumps ,load,loads等方法。区别在于dumps不会写入到文件。
import pickle string = ['a', 2341, 'adsf'] p_str= pickle.dumps(string)
print(p_str)
l_str = pickle.loads(p_str)
print(l_str) p_str1 = 'This is a test!'
with open('d:/python/pydev/day3/src/p.pkl', 'wb') as file:
pickle.dump(p_str1, file) with open('d:/python/pydev/day3/src/p.pkl', 'rb' ) as file1:
l_file = pickle.load(file1) print(l_file)
pickle
结果如下：
b'\x80\x03]q\x00(X\x01\x00\x00\x00aq\x01M%\tX\x04\x00\x00\x00adsfq\x02e.'
['a', 2341, 'adsf']
This is a test!
'''
The file argument must have a write() method that accepts a single bytes argument.
It can thus be an on-disk file opened for binary writing
'''
注意：pickle以二进制处理，所以文件打开方式应该加上b, 如'wb'.'rb'如果仅以w方式打开则会报错，这里可能理解有误，奇怪的是json用wb会报错，而w则正常。
import json string = ['a', 2341, 'adsf'] p_str= json.dumps(string)
print(p_str)
l_str = json.loads(p_str)
print(l_str) p_str1 = 'This is a test!'
with open('d:/python/pydev/day3/src/p.pkl', 'w') as file:
json.dump(p_str1, file) with open('d:/python/pydev/day3/src/p.pkl', 'r' ) as file1:
l_file = json.load(file1) print(l_file)
json
运行结果：
["a", 2341, "adsf"]
['a', 2341, 'adsf']
This is a test!
pickle是python特有的，而json支持语言很多。另外json dump的结果是可以直接读的，pickle则不行。