You're trying to read the string "data.txt". What you want is to open and read the file.
import json
with open('data.txt', 'r') as data_file:
json_data = data_file.read()
data = json.loads(json_data)
Answer from Agustín Lado on Stack OverflowYou're trying to read the string "data.txt". What you want is to open and read the file.
import json
with open('data.txt', 'r') as data_file:
json_data = data_file.read()
data = json.loads(json_data)
Try:
data = json.load(open("data.txt", 'r'))
json.loads interprets a string as JSON data, while json.load takes a file object and reads it, then interprets it as JSON.
In your for loop statement, Each item in json_array is a dictionary and the dictionary does not have a key store_details. So I modified the program a little bit
import json
input_file = open ('stores-small.json')
json_array = json.load(input_file)
store_list = []
for item in json_array:
store_details = {"name":None, "city":None}
store_details['name'] = item['name']
store_details['city'] = item['city']
store_list.append(store_details)
print(store_list)
If you arrived at this question simply looking for a way to read a json file into memory, then use the built-in json module.
with open(file_path, 'r') as f:
data = json.load(f)
If you have a json string in memory that needs to be parsed, use json.loads() instead:
data = json.loads(my_json_string)
Either way, now data is converted into a Python data structure (list/dictionary) that may be (deeply) nested and you'll need Python methods to manipulate it.
If you arrived here looking for ways to get values under several keys as in the OP, then the question is about looping over a Python data structure. For a not-so-deeply-nested data structure, the most readable (and possibly the fastest) way is a list / dict comprehension. For example, for the requirement in the OP, a list comprehension does the job.
store_list = [{'name': item['name'], 'city': item['city']} for item in json_array]
# [{'name': 'Mall of America', 'city': 'Bloomington'}, {'name': 'Tempe Marketplace', 'city': 'Tempe'}]
Other types of common data manipulation:
For a nested list where each sub-list is a list of items in the
json_array.store_list = [[item['name'], item['city']] for item in json_array] # [['Mall of America', 'Bloomington'], ['Tempe Marketplace', 'Tempe']]For a dictionary of lists where each key-value pair is a category-values in the
json_array.store_data = {'name': [], 'city': []} for item in json_array: store_data['name'].append(item['name']) store_data['city'].append(item['city']) # {'name': ['Mall of America', 'Tempe Marketplace'], 'city': ['Bloomington', 'Tempe']}For a "transposed" nested list where each sub-list is a "category" in
json_array.store_list = list(store_data.values()) # [['Mall of America', 'Tempe Marketplace'], ['Bloomington', 'Tempe']]
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
print(data['fruits'])
# the print displays:
# ['apple', 'banana', 'orange']
You had everything you needed. data will be a dict, and data['fruits'] will be a list
Tested on Ideone.
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
fruits_list = data['fruits']
print fruits_list
After you parse the JSON, you will end up with a Python dict. So, suppose the above JSON is in a string named input_data:
import json
# This converts from JSON to a python dict
parsed_input = json.loads(input_data)
# Now, all of your static variables are referenceable as keys:
secret = parsed_input['secret']
minutes = parsed_input['minutes']
link = parsed_input['link']
# Plus, you can get your bookmark collection as:
bookmark_collection = parsed_input['bookmark_collection']
# Print a list of names of the bookmark collections...
print bookmark_collection.keys() # Note this contains sublinks, so remove it if needed
# Get the name of the Boarding Pass bookmark:
print bookmark_collection['boarding_pass']['name']
# Print out a list of all bookmark links as:
# Boarding Pass
# * 1: http://www.1.com/
# * 2: http://www.2.com/
# ...
for bookmark_definition in bookmark_collection.values():
# Skip sublinks...
if bookmark_definition['name'] == 'sublinks':
continue
print bookmark_definition['name']
for bookmark in bookmark_definition['bookmarks']:
print " * %(name)s: %(link)s" % bookmark
# Get the sublink definition:
sublinks = parsed_input['bookmark_collection']['sublinks']
# .. and print them
print sublinks['name']
for link in sublinks['link']:
print ' *', link
Hmm, doesn't json.loads do the trick?
For example, if your data is in a file,
import json
text = open('/tmp/mydata.json').read()
d = json.loads(text)
# first level fields
print d['minutes'] # or 'secret' or 'link'
# the names of each of bookmark_collections's items
print d['bookmark_collection'].keys()
# the sublinks section, as a dict
print d['bookmark_collection']['sublinks']
The output of this code (given your sample input above) is:
20
[u'sublinks', u'free_link', u'boarding_pass']
{u'link': [u'http://www.1.com', u'http://www.2.com', u'http://www.3.com'], u'name': u'sublinks'}
Which, I think, gets you what you need?