"""
	report the number of crime incident reported by the Houston Police Department to FBI's National Incident-Based Reporting System (NIBRS) 
"""

def get_date(line):
    """ Get the date from a line in NIBRS file, a csv file. The date is the value of column #2.
    """
    return line.split(',')[1]

filename = 'NIBRSPublicView2025.csv'

count = {}  
#   dict storing the count of incidence in a date. E.g., '1/1/2025'

with open(filename, 'r') as f:
    #   Discard the first line, the heading.
    f.readline()
    
    #   process every line to update the dict count.
    for i, line in enumerate(f):
        date = get_date(line)
        if date in count:
            # not the first occurence of date.
            count[date] += 1
        else:
            # first occurence of date.
            count[date] = 1

print("Houston crime incidences reported to FBI NIBRS in 2025")

for date, value in count.items():
    print(f"{date}: {value}")