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fixed outputs in #json-unknown-types

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This commit is contained in:
Mark Pilgrim
2009-08-09 21:03:38 -07:00
parent 36cc2f2c28
commit f55c153b9f
1 changed files with 55 additions and 9 deletions
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serializing.html
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@@ -234,6 +234,8 @@ struct_time
357: . STOP
highest protocol among opcodes = 3</samp></pre>
<p>FIXME more here about <i>fix_imports</i> and such?
<p class=a>&#x2042;
<h2 id=pickle-advanced>Serializing Complex Python Objects</h2>
@@ -291,15 +293,27 @@ highest protocol among opcodes = 3</samp></pre>
<h3 id=json-unknown-types>Serializing Datatypes Unsupported by <abbr>JSON</abbr></h3>
<pre class=screen>
<samp class=p>>>> </samp><kbd class=pp>shell</kbd>
<a><samp class=p>>>> </samp><kbd class=pp>shell</kbd>
<samp class=pp>1</samp>
<samp class=p>>>> </samp><kbd class=pp>entry</kbd>
<samp class=pp>FIXME</samp>
<samp class=p>>>> </samp><kbd class=pp>import json</kbd>
<samp class=p>>>> </samp><kbd class=pp>with open('entry.json', 'w', encoding='utf-8') as f:</kbd>
<samp class=p>... </samp><kbd class=pp> json.dump(entry)</kbd>
<a><samp class=p>>>> </samp><kbd class=pp>with open('entry.json', 'w', encoding='utf-8') as f:</kbd>
<samp class=p>... </samp><kbd class=pp> json.dump(entry, f)</kbd>
<samp class=p>... </samp>
<samp class=traceback>FIXME</samp></pre>
<samp class=traceback>Traceback (most recent call last):
File "&lt;stdin>", line 5, in &lt;module>
File "C:\Python31\lib\json\__init__.py", line 178, in dump
for chunk in iterable:
File "C:\Python31\lib\json\encoder.py", line 408, in _iterencode
for chunk in _iterencode_dict(o, _current_indent_level):
File "C:\Python31\lib\json\encoder.py", line 382, in _iterencode_dict
for chunk in chunks:
File "C:\Python31\lib\json\encoder.py", line 416, in _iterencode
o = _default(o)
File "C:\Python31\lib\json\encoder.py", line 170, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: b'\xde\xd5\xb4\xf8' is not JSON serializable</samp></pre>
<ol>
<li>FIXME
</ol>
@@ -325,11 +339,26 @@ def to_json(python_object):
<samp class=p>>>> </samp><kbd class=pp>with open('entry.json', 'w', encoding='utf-8') as f:</kbd>
<samp class=p>... </samp><kbd class=pp> json.dump(entry, default = customserializer.to_json)</kbd>
<samp class=p>... </samp>
<samp class=traceback>FIXME</samp></pre>
<samp class=traceback>Traceback (most recent call last):
File "&lt;stdin>", line 9, in &lt;module>
json.dump(entry, f, default=customserializer.to_json)
File "C:\Python31\lib\json\__init__.py", line 178, in dump
for chunk in iterable:
File "C:\Python31\lib\json\encoder.py", line 408, in _iterencode
for chunk in _iterencode_dict(o, _current_indent_level):
File "C:\Python31\lib\json\encoder.py", line 382, in _iterencode_dict
for chunk in chunks:
File "C:\Python31\lib\json\encoder.py", line 416, in _iterencode
o = _default(o)
File "/Users/pilgrim/diveintopython3/examples/customserializer.py", line 12, in to_json
raise TypeError(repr(python_object) + ' is not JSON serializable')
TypeError: time.struct_time(tm_year=2009, tm_mon=3, tm_mday=27, tm_hour=22, tm_min=20, tm_sec=42, tm_wday=4, tm_yday=86, tm_isdst=-1) is not JSON serializable</samp></pre>
<ol>
<li>FIXME
</ol>
<p>FIXME
<pre class=pp><code># customserializer.py
def to_json(python_object):
if isinstance(python_object, time.struct_time):
@@ -359,9 +388,13 @@ def to_json(python_object):
<pre class=screen>
<samp class=p>you@localhost:~/diveintopython3/examples$ </samp><kbd>ls -l example.json</kbd>
<samp class=pp>FIXME</samp>
<samp>-rw-r--r-- 1 you you 391 Aug 3 13:34 entry.json</samp>
<samp class=p>you@localhost:~/diveintopython3/examples$ </samp><kbd>cat example.json</kbd>
<samp class=pp>FIXME</samp></pre>
<samp>{"published_date": {"__class__": "time.asctime", "__value__": "Fri Mar 27 22:20:42 2009"},
"comments_link": null, "internal_id": {"__class__": "bytes", "__value__": [222, 213, 180, 248]},
"tags": ["diveintopython", "docbook", "html"], "title": "Dive into history, 2009 edition",
"article_link": "http://diveintomark.org/archives/2009/03/27/dive-into-history-2009-edition",
"published": true}</samp></pre>
<ol>
<li>FIXME
</ol>
@@ -380,7 +413,14 @@ NameError: name 'entry' is not defined</samp>
<samp class=p>>>> </samp><kbd class=pp>with open('entry.json', 'r', encoding='utf-8') as f:</kbd>
<samp class=p>... </samp><kbd class=pp> entry = json.load(f)</kbd>
<samp class=p>... </samp>
<samp class=traceback>FIXME</samp></pre>
<samp class=p>>>> </samp><kbd class=pp>entry</kbd>
<samp class=pp>{'comments_link': None,
'internal_id': {'__class__': 'bytes', '__value__': [222, 213, 180, 248]},
'title': 'Dive into history, 2009 edition',
'tags': ['diveintopython', 'docbook', 'html'],
'article_link': 'http://diveintomark.org/archives/2009/03/27/dive-into-history-2009-edition',
'published_date': {'__class__': 'time.asctime', '__value__': 'Fri Mar 27 22:20:42 2009'},
'published': True}</samp></pre>
<ol>
<li>FIXME
</ol>
@@ -404,7 +444,13 @@ def from_json(json_object):
<samp class=p>... </samp><kbd class=pp> entry = json.load(f, object_hook = customserializer.from_json)</kbd>
<samp class=p>... </samp>
<samp class=p>>>> </samp><kbd class=pp>entry</kbd>
<samp class=pp>FIXME</samp></pre>
<samp class=pp>{'comments_link': None,
'internal_id': b'\xde\xd5\xb4\xf8',
'title': 'Dive into history, 2009 edition',
'tags': ['diveintopython', 'docbook', 'html'],
'article_link': 'http://diveintomark.org/archives/2009/03/27/dive-into-history-2009-edition',
'published_date': time.struct_time(tm_year=2009, tm_mon=3, tm_mday=27, tm_hour=22, tm_min=20, tm_sec=42, tm_wday=4, tm_yday=86, tm_isdst=-1),
'published': True}</samp></pre>
<ol>
<li>FIXME
</ol>