File System

Levython provides built-in functions for reading, writing, and checking files.

read_file(path)#

Read the entire contents of a file as a string.

• path string
  Path to the file to read

content <- read_file("data.txt")
say(content)

write_file(path, content)#

Write a string to a file. Creates the file if it doesn't exist, overwrites if it does.

• path string
  Path to the file to write
• content string
  Content to write to the file

write_file("output.txt", "Hello, World!")
say("File written successfully")

file_exists(path)#

Check if a file exists at the given path.

• path string
  Path to check

if file_exists("config.txt") {
    say("Config file found")
    config <- read_file("config.txt")
} else {
    say("Config file not found, using defaults")
}

Examples#

Read and Process a File

# Read file and count characters
content <- read_file("document.txt")
char_count <- len(content)
say("Character count: " + str(char_count))

Save Program Output

# Generate and save report
report <- "Levython Report\n"
report <- report + "===============\n"
report <- report + "Status: OK\n"
report <- report + "Version: 1.0\n"

write_file("report.txt", report)
say("Report saved to report.txt")

Safe File Reading

act read_safe(path) {
    if file_exists(path) {
        -> read_file(path)
    }
    -> ""
}

data <- read_safe("optional.txt")
if len(data) > 0 {
    say("File content: " + data)
} else {
    say("File is empty or doesn't exist")
}