def sm_main_data():


    #DATA PROCESSING - Impression|Engagements|VideoViews
    urlMain = "https://api.simplymeasured.com/v1/analytics/" + key.accountId + "/posts/metrics?
    filter=analytics.timeseries_key.gte(" + config.start + ").lte(" + config.end + ")&
    filter=channel.eq(" + config.which_social_media + ")&
    metrics=analytics.engagement_total,analytics.video.views_count,analytics.impressions&
    dimensions=data_source_id,channel,analytics.timeseries_key.by(" + config.per_what + ")"

    headers = {'content-type': 'application/json',
            'Authorization': 'Bearer ' + key.token}

    #Receive data from SM (main data) / modified it and save as JSON file
    responseMain = requests.get(urlMain, headers=headers).json()
    pprint.pprint(responseMain)
    pass

sm_main_data()

print(key.accountId)
print(config.start)
print(config.end)
print(config.which_social_media)
print(config.per_what)

{u'errors': [{u'detail': u'`    filter` parameter is not supported.,`    metrics` parameter is not supported.,`    dimensions` parameter is not supported.',
              u'status': u'422',
              u'title': u'Unprocessable Entity'}]}

#DATA PROCESSING - Impression|Engagements|VideoViews
urlMain = "https://api.simplymeasured.com/v1/analytics/" + key.accountId + "/posts/metrics?
filter=analytics.timeseries_key.gte(" + config.start + ").lte(" + config.end + ")&
filter=channel.eq(" + config.which_social_media + ")&
metrics=analytics.engagement_total,analytics.video.views_count,analytics.impressions&
dimensions=data_source_id,channel,analytics.timeseries_key.by(" + config.per_what + ")"

headers = {'content-type': 'application/json',
    'Authorization': 'Bearer ' + key.token}

#Receive data from SM (main data) / modified it and save as JSON file
responseMain = requests.get(urlMain, headers=headers).json()
pprint.pprint(responseMain)

`    filter` parameter is not supported.
`    metrics` parameter is not supported.

def sm_main_data():
    # ...
    urlMain = "https://api.simplymeasured.com/v1/analytics/" + key.accountId + "/posts/metrics?
    filter=analytics.timeseries_key.gte(" + config.start + ").lte(" + config.end + ")&
    filter=channel.eq(" + config.which_social_media + ")&
    metrics=analytics.engagement_total,analytics.video.views_count,analytics.impressions&
    dimensions=data_source_id,channel,analytics.timeseries_key.by(" + config.per_what + ")"

# ^^^ those lines are indented but the whitespace is part of the string

urlMain = "https://api.simplymeasured.com/v1/analytics/{}/posts/metrics".format(key.accountId)
params = {
    'filter': [
        'analytics.timeseries_key.gte({c.start}).lte({c.end})".format(c=config),
        'channel.eq({c.which_social_media})'.format(c=config),
    ],
    'metrics': 'analytics.engagement_total,analytics.video.views_count,analytics.impressions',
    'dimensions':
        'data_source_id,channel,'
        'analytics.timeseries_key.by({c.per_what})'.format(c=config),
}
headers = {'Authorization': 'Bearer {k.token}'.format(k=key)}
responseMain = requests.get(urlMain, params=params, headers=headers).json()