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shrink.py
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shrink.py
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# == shrink.py Author: Zuinige Rijder ========================================
"""
Simple Python3 script to shrink monitor.csv
identical lines removed (first column excluded)
INPUTFILE: monitor.csv or monitor.VIN.csv (latter if vin=VIN parameter)
OUTPUTFILE: shrinked_monitor.csv or shrinked_monitor.VIN.csv
(latter if vin=VIN parameter)
standard output: summary per kml placemark
Usage:
python shrink.py [vin=VIN]
"""
from pathlib import Path
from monitor_utils import get_vin_arg
INPUT_CSV_FILE = Path("monitor.csv")
OUTPUT_CSV_FILE = Path("shrinked_monitor.csv")
VIN = get_vin_arg()
if VIN != "":
INPUT_CSV_FILE = Path(f"monitor.{VIN}.csv")
OUTPUT_CSV_FILE = Path(f"shrinked_monitor.{VIN}.csv")
def shrink():
"""shrink csv file"""
with INPUT_CSV_FILE.open("r", encoding="utf-8") as inputfile:
with OUTPUT_CSV_FILE.open("w", encoding="utf-8") as outputfile:
prevline = ""
previndex = -1
for line in inputfile:
index = line.find(",")
if (
index < 0
or previndex < 0
or index != previndex
or prevline[previndex:] != line[index:]
):
outputfile.write(line)
prevline = line
previndex = index
shrink() # do the work