1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
# test json.dump in combination with io.IOBase
try:
import io, json
except ImportError:
print("SKIP")
raise SystemExit
if not hasattr(io, "IOBase"):
print("SKIP")
raise SystemExit
# a user stream that only has the write method
class S(io.IOBase):
def __init__(self):
self.buf = ""
def write(self, buf):
if type(buf) == bytearray:
# uPy passes a bytearray, CPython passes a str
buf = str(buf, "ascii")
self.buf += buf
return len(buf)
# dump to the user stream
s = S()
json.dump([123, {}], s)
print(s.buf)
|
