problem in entering address of a file in input

[akbarza]

hi
i read https://realpython.com/introduction-to-p...enerators/
there is a file as techcruch.csv in the above address.
I downloaded it on my desktop, so its address on my PC is: C:\Users\akbar\Desktop\techcruch.csv
in the below code(IDLE):

address=r"C:\Users\akbar\Desktop\techcruch.csv"
def csv_reader(file_name):
    for row in open(file_name, "r"):
        yield row
def y(address):
    csv_gen = csv_reader(address)
    row_count = 0
    for row in csv_gen:
       row_count += 1
    print(f"Row count is {row_count}")


y(address)

the below error is displayed:

Error:
Traceback (most recent call last):
  File "<pyshell#27>", line 1, in <module>
    y(address)
  File "<pyshell#26>", line 5, in y
    for row in csv_gen:
  File "<pyshell#2>", line 2, in csv_reader
    for row in open(file_name, "r"):
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\akbar\\Desktop\\techcruch.csv'

I also did the below tests and you can see what idle showed to me:

address="C:\Users\akbar\Desktop\techcruch.csv"

Error:
SyntaxError: incomplete input

address=r"C:\Users\akbar\Desktop\techcruch.csv"
address

Output:
'C:\\Users\\akbar\\Desktop\\techcruch.csv'

address=f"C:\Users\akbar\Desktop\techcruch.csv"

Error:
SyntaxError: incomplete input

address=r"C:\Users\akbar\Desktop\techcruch.csv"
y(address)

Error:
Traceback (most recent call last):
  File "<pyshell#35>", line 1, in <module>
    y(address)
  File "<pyshell#26>", line 5, in y
    for row in csv_gen:
  File "<pyshell#2>", line 2, in csv_reader
    for row in open(file_name, "r"):
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\akbar\\Desktop\\techcruch.csv'

so what can I do to input the address of the techcruch.csv file to the y function?
thanks