Write a program to replace all spaces from text with - (dash)from the file podar.txt.

Sure, here is a simple Python program that reads a file, replaces all spaces with dashes, and writes the result back to the file.

# Open the file in read mode and read its content
with open('podar.txt', 'r') as file:
    content = file.read()

# Replace all spaces with dashes
content = content.replace(' ', '-')

# Open the file in write mode and write the modified content
with open('podar.txt', 'w') as file:
    file.write(content)

This program works as follows:

1. It opens the file podar.txt in read mode and reads its content into the variable content.
2. It uses the replace method of the string class to replace all spaces in content with dashes. The result is stored back in content.
3. It opens the file podar.txt again, this time in write mode, and writes the modified content back to the file. This overwrites the original content of the file.

Please replace 'podar.txt' with your actual file path and name.