How to dump a dict to a json file

Question

I have a dict like this   sample     ObjectInterpolator   1629    PointInterpolator   1675   RectangleInterpolator   2042    I can t figure out how to dump the dict to a json file as showed below                 name    interpolator        children             name    ObjectInterpolator    size   1629           name    PointInterpolator    size   1675           name    RectangleInterpolator    size   2042             Is there a pythonic way to do this    You may guess that I want to generate a d3 treemap

User · Answer

Combine the answer of  mgilson and  gnibbler  I found what I need was this     d     name   interpolator         children     name  key  size  value  for key value in sample items     j   json dumps d  indent 4  f   open  sample json    w   print    f  j f close      It this way  I got a pretty-print json file  The tricks print  gt  gt  f  j is found from here   http   www anthonydebarros com 2012 03 11 generate-json-from-sql-using-python

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import json with open  result json    w   as fp      json dump sample  fp    This is an easier way to do it   In the second line of code the file result json gets created and opened as the variable fp   In the third line your dict sample gets written into the result json

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If you re using Path  example path   Path   tmp test json   example dict     x   24   y   25  json str   json dumps example dict  indent 4      n  example path write text json str  encoding  utf-8

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Also wanted to add this  Python 3 7  import json  with open  quot dict to json textfile txt quot    w   as fout      json dumps str   json dumps a dictionary  indent 4      print json dumps str  file fout

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d     name   interpolator         children     name  key  size  value  for key value in sample items     json string   json dumps d    Of course  it s unlikely that the order will be exactly preserved     But that s just the nature of dictionaries

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This should give you a start   gt  gt  gt  import json  gt  gt  gt  print json dumps    name   k   size   v  for k v in sample items     indent 4                   name    PointInterpolator            size   1675                       name    ObjectInterpolator            size   1629                       name    RectangleInterpolator            size   2042

User · Answer

with pretty-print format   import json  with open path to file   w   as file      json string   json dumps sample  default lambda o  o   dict    sort keys True  indent 2      file write json string

[python] How to dump a dict to a json file?

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