如何在python3中使用pyShp修复"TypeError:类型为'bytes‘的对象不是JSON序列化的“

Question

我目前正在使用pyShp将shapefile转换为geojson文件。我看到很多人使用和我一样的脚本，但我真的不知道为什么它不能在我的电脑上工作。我一次又一次地遇到同样的错误，但我不知道它是从哪里来的。

import shapefile
from json import dumps

   # read the shapefile
reader = shapefile.Reader("my.shp")
fields = reader.fields[1:]
field_names = [field[0] for field in fields]
buffer = []
for sr in reader.shapeRecords():
    atr = dict(zip(field_names, sr.record))
    geom = sr.shape.__geo_interface__
    buffer.append(dict(type="Feature", geometry=geom, properties=atr)) 

   # write the GeoJSON file

geojson = open("pyshp-demo.json", "w")
geojson.write(dumps({"type": "FeatureCollection", "features": buffer}, indent=2) + "\n")
geojson.close()

下面是我得到的输出：

TypeError                                 Traceback (most recent call last)
<ipython-input-19-f2d1179eb9c9> in <module>()
     15 
     16 geojson = open("pyshp-demo.json", "w")
---> 17 geojson.write(dumps({"type": "FeatureCollection", "features": buffer}, indent=2) + "\n")
     18 geojson.close()

/usr/lib/python3.6/json/__init__.py in dumps(obj, skipkeys, ensure_ascii, check_circular, allow_nan, cls, indent, separators, default, sort_keys, **kw)
    236         check_circular=check_circular, allow_nan=allow_nan, indent=indent,
    237         separators=separators, default=default, sort_keys=sort_keys,
--> 238         **kw).encode(obj)
    239 
    240 

/usr/lib/python3.6/json/encoder.py in encode(self, o)
    199         chunks = self.iterencode(o, _one_shot=True)
    200         if not isinstance(chunks, (list, tuple)):
--> 201             chunks = list(chunks)
    202         return ''.join(chunks)
    203 

/usr/lib/python3.6/json/encoder.py in _iterencode(o, _current_indent_level)
    428             yield from _iterencode_list(o, _current_indent_level)
    429         elif isinstance(o, dict):
--> 430             yield from _iterencode_dict(o, _current_indent_level)
    431         else:
    432             if markers is not None:

/usr/lib/python3.6/json/encoder.py in _iterencode_dict(dct, _current_indent_level)
    402                 else:
    403                     chunks = _iterencode(value, _current_indent_level)
--> 404                 yield from chunks
    405         if newline_indent is not None:
    406             _current_indent_level -= 1

/usr/lib/python3.6/json/encoder.py in _iterencode_list(lst, _current_indent_level)
    323                 else:
    324                     chunks = _iterencode(value, _current_indent_level)
--> 325                 yield from chunks
    326         if newline_indent is not None:
    327             _current_indent_level -= 1

/usr/lib/python3.6/json/encoder.py in _iterencode_dict(dct, _current_indent_level)
    402                 else:
    403                     chunks = _iterencode(value, _current_indent_level)
--> 404                 yield from chunks
    405         if newline_indent is not None:
    406             _current_indent_level -= 1

/usr/lib/python3.6/json/encoder.py in _iterencode_dict(dct, _current_indent_level)
    402                 else:
    403                     chunks = _iterencode(value, _current_indent_level)
--> 404                 yield from chunks
    405         if newline_indent is not None:
    406             _current_indent_level -= 1

/usr/lib/python3.6/json/encoder.py in _iterencode(o, _current_indent_level)
    435                     raise ValueError("Circular reference detected")
    436                 markers[markerid] = o
--> 437             o = _default(o)
    438             yield from _iterencode(o, _current_indent_level)
    439             if markers is not None:

/usr/lib/python3.6/json/encoder.py in default(self, o)
    178         """
    179         raise TypeError("Object of type '%s' is not JSON serializable" %
--> 180                         o.__class__.__name__)
    181 
    182     def encode(self, o):

TypeError: Object of type 'bytes' is not JSON serializable

通常情况下，我应该有一个正确的geojson文件。

如果您能帮助我，非常感谢:)

Answer 1

#.....

buffer = []
reader.encoding = "latin1"

#......

是从编码中得到的。对此错误执行More details。