Unable to Iterate DictReader in csv.py

[jvEhrlinger]

Hello, I'm attempting to use the CSV module with MicroPython, and am hitting a wall when trying to instantiate a DictReader.
The relevant code region follows..

def getServiceID():
    # so, let's start by pulling the date and getting a dictionary of all of our trips.
    theDate = strftime("%Y%m%d", t.localtime())
    # grab our service id for the day
    with open('sd/gtfslirr/calendar_dates.txt', newline='') as dateFile:
        dateReader = csv.DictReader(dateFile)
        for row in dateReader:
            if row['date'] == theDate:
                service_id = row['service_id']
                return service_id

and the accompanying error...

Traceback (most recent call last):
  File "boot.py", line 173, in <module>
  File "boot.py", line 144, in main
  File "boot.py", line 46, in getServiceID
  File "csv.py", line 149, in __next__
  File "csv.py", line 52, in __next__
AttributeError: 'match' object has no attribute 'groups'

Line 46, in this case, being dateReader = csv.DictReader(dateFile)

Thank you for maintaining the module, and please let me know if you have any insight into why I might be experiencing this.