converting json to string in python

Question

I did not explain my questions clearly at beginning  Try to use str   and json dumps   when converting json to string in python     gt  gt  gt  data     jsonKey    jsonValue   title    hello world    gt  gt  gt  print json dumps data    jsonKey    jsonValue    title    hello world    gt  gt  gt  print str data    jsonKey    jsonValue    title    hello world    gt  gt  gt  json dumps data     jsonKey    jsonValue    title    hello world     gt  gt  gt  str data     jsonKey    jsonValue    title    hello world      My question is    gt  gt  gt  data     jsonKey    jsonValue   title    hello world     gt  gt  gt  str data      jsonKey      jsonValue      title     hello world       gt  gt  gt  json dumps data     jsonKey    jsonValue    title    hello world       gt  gt  gt     My expected output     jsonKey    jsonValue   title    hello world       gt  gt  gt  data     jsonKey    jsonValue   title    hello world      File   lt stdin gt    line 1     data     jsonKey    jsonValue   title    hello world                                                                SyntaxError  EOL while scanning string literal  gt  gt  gt  data     jsonKey    jsonValue   title    hello world      gt  gt  gt  json dumps data     jsonKey    jsonValue    title    hello world        gt  gt  gt  str data      jsonKey      jsonValue      title      hello world        My expected output     jsonKey    jsonValue   title    hello world       It is not necessary to change the output string to json  dict  again for me   How to do this

User · Accepted Answer

json dumps   is much more than just making a string out of a Python object  it would always produce a valid JSON string  assuming everything inside the object is serializable  following the Type Conversion Table   For instance  if one of the values is None  the str   would produce an invalid JSON which cannot be loaded     gt  gt  gt  data     jsonKey   None   gt  gt  gt  str data     jsonKey   None    gt  gt  gt  json loads str data   Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt    File   System Library Frameworks Python framework Versions 2 7 lib python2 7 json   init   py   line 338  in loads     return  default decoder decode s    File   System Library Frameworks Python framework Versions 2 7 lib python2 7 json decoder py   line 366  in decode     obj  end   self raw decode s  idx  w s  0  end      File   System Library Frameworks Python framework Versions 2 7 lib python2 7 json decoder py   line 382  in raw decode     obj  end   self scan once s  idx  ValueError  Expecting property name  line 1 column 2  char 1    But the dumps   would convert None into null making a valid JSON string that can be loaded    gt  gt  gt  import json  gt  gt  gt  data     jsonKey   None   gt  gt  gt  json dumps data     jsonKey   null    gt  gt  gt  json loads json dumps data    u jsonKey   None

User · Answer

There are other differences  For instance    time   datetime now    cannot be serialized to JSON  but can be converted to string  You should use one of these tools depending on the purpose  i e  will the result later be decoded

[python] converting json to string in python

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