Source code for numerapi.utils

import dateutil.parser
import requests
import tqdm
import os
import errno
import decimal
import logging
import json

logger = logging.getLogger(__name__)

[docs]def parse_datetime_string(s): if s is None: return None dt = dateutil.parser.parse(s) return dt
[docs]def parse_float_string(s): if s is None: return None try: f = decimal.Decimal(s.replace(",", "")) except decimal.InvalidOperation: f = None return f
[docs]def replace(dictionary, key, function): if dictionary is not None and key in dictionary: dictionary[key] = function(dictionary[key])
[docs]def download_file(url, dest_path, show_progress_bars=True): r = requests.get(url, stream=True) r.raise_for_status() # Total size in bytes. total_size = int(r.headers.get('content-length', 0)) # write dataset to file and show progress bar pbar = tqdm.tqdm(total=total_size, unit='B', unit_scale=True, desc=dest_path, disable=not show_progress_bars) with open(dest_path, "wb") as f: for chunk in r.iter_content(1024): f.write(chunk) pbar.update(1024)
[docs]def ensure_directory_exists(path): try: # `exist_ok` option is only available in Python 3.2+ os.makedirs(path) except OSError as exception: if exception.errno != errno.EEXIST: raise
[docs]def post_with_err_handling(url, body, headers, timeout=None): try: r =, json=body, headers=headers, timeout=timeout) r.raise_for_status() except requests.exceptions.HTTPError as e: logger.error("Http Error: {}".format(e)) except requests.exceptions.ConnectionError as e: logger.error("Error Connecting: {}".format(e)) except requests.exceptions.Timeout as e: logger.error("Timeout Error: {}".format(e)) except requests.exceptions.RequestException as e: logger.error("Oops, something went wrong: {}".format(e)) try: return r.json() except UnboundLocalError as e: # `r` isn't available, probably because the try/except above failed pass except json.decoder.JSONDecodeError as e: logger.error("Did not receive a valid JSON: {}".format(e)) return {}