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Speed up parsing the NMEEA messages #171

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Merged
betaBison merged 2 commits into from
Apr 6, 2025
Merged

Speed up parsing the NMEEA messages #171

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77008ee
Speed up parsing the NMEEA messages. Using the pandas concat() functi…
Oct 31, 2024
24be7e0
Update nmea.py
betaBison Apr 6, 2025
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1 change: 1 addition & 0 deletions CONTRIBUTORS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -7,3 +7,4 @@ Shivam Soni
Sriramya Bhamidipati
Dalton Vega
Daniel Neamati
Sandro Klarer
9 changes: 4 additions & 5 deletions gnss_lib_py/parsers/nmea.py
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Expand Up @@ -67,7 +67,7 @@ def __init__(self, input_path, msg_types=None,
if msg_types is None:
# Use default message types
msg_types = ['GGA', 'RMC']
pd_df = pd.DataFrame()
temporary_dictionary_list_df = []
field_dict = {}
prev_timestamp = None

Expand Down Expand Up @@ -101,8 +101,7 @@ def __init__(self, input_path, msg_types=None,
delta_t = datetime.datetime.combine(datestamp(date), timestamp(time))
field_dict['gps_millis'] = datetime_to_gps_millis(delta_t)

new_row = pd.DataFrame([field_dict])
pd_df = pd.concat([pd_df, new_row])
temporary_dictionary_list_df.append(field_dict)
field_dict = {}
prev_timestamp = msg.timestamp
if "sentence_type" in msg.__dir__() and msg.sentence_type in msg_types:
Expand Down Expand Up @@ -134,8 +133,8 @@ def __init__(self, input_path, msg_types=None,
date = field_dict.pop('datestamp')
delta_t = datetime.datetime.combine(datestamp(date), timestamp(time))
field_dict['gps_millis'] = datetime_to_gps_millis(delta_t)
new_row = pd.DataFrame([field_dict])
pd_df = pd.concat([pd_df, new_row])
temporary_dictionary_list_df.append(field_dict)
pd_df = pd.DataFrame.from_dict(temporary_dictionary_list_df)
# As per `gnss_lib_py` standards, convert the heading from degrees
# to radians
pd_df['true_course_rad'] = (np.pi/180.)*pd_df['true_course']\
Expand Down