鉴于OP的问题有一个包含JSON内容的文件，这个答案可能更好：import json
import ast
myFile = 'myFile.json'
jsonString = lastLineofFile(myfile)
d = ast.literal_eval(jsonString) # from file
d.update(dict)
with open(myFile, 'a') as f:
json.dump(d, f)
此外，由于这是增量的，因此可以通过以下有效的帮助函数获取文件的最后一行：# Read the last line of a file. Return 0 if not read in 'timeout' number of seconds
def lastLineOfFile(fileName, timeout = 1):
elapsed_time = 0
offset = 0
line = ''
start_time = time.time()
with open(fileName) as f:
while True and elapsed_time < timeout:
offset -= 1
f.seek(offset, 2)
nextline = f.next()
if nextline == '\n' and line.strip():
return line
else:
line = nextline
elapsed_time = time.time() - start_time
if elapsed_time >= timeout:
return None