# Load required modules
import sys
If an argument is present,
we are reading from a file
specified in sys.argv[1]
if len(sys.argv) > 1:
reader = open(sys.argv[1])
If no argument, read from stdin
else:
reader = sys.stdin
x = int(reader.readline())
print(x)

# Load required modules
import sys
If an argument is present,
we are reading from a file
specified in sys.argv[1]
if len(sys.argv) > 1:
reader = open(sys.argv[1])
If no argument, read from stdin
else:
reader = sys.stdin
x = int(reader.readline())
print(x)

Forgot Import?

NameError: name 'sys' is not defined

# Load required modules
import sys
If an argument is present,
we are reading from a file
specified in sys.argv[1]
if len(sys.argv) > 1:
reader = open(sys.argv[1])
If no argument, read from stdin
else:
reader = sys.stdin
x = int(reader.readline())
print(x)

# Load required modules
import sys
If an argument is present,
we are reading from a file
specified in sys.argv[1]
if len(sys.argv) > 1:
reader = open(sys.argv[1])
If no argument, read from stdin
else:
reader = sys.stdin
x = int(reader.readline())
print(x)

# Load required modules
import sys
If an argument is present,
we are reading from a file
specified in sys.argv[1]
if len(sys.argv) > 1:
reader = open(sys.argv[1])
If no argument, read from stdin
else:
reader = sys.stdin
x = int(reader.readline())
print(x)

x = int(reader.readline())
y = float(reader.readline())

# Load required modules
import sys
If an argument is present,
we are reading from a file
specified in sys.argv[1]
if len(sys.argv) > 1:
reader = open(sys.argv[1])
If no argument, read from stdin
else:
reader = sys.stdin
x = int(reader.readline())
print(x)