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#!/usr/bin/env python
"""
An example of a custom lexer that prints the input text in random colors.
"""
from prompt_toolkit.lexers import Lexer
from prompt_toolkit.shortcuts import prompt
from prompt_toolkit.styles.named_colors import NAMED_COLORS
class RainbowLexer(Lexer):
def lex_document(self, document):
colors = list(sorted(NAMED_COLORS, key=NAMED_COLORS.get))
def get_line(lineno):
return [
(colors[i % len(colors)], c)
for i, c in enumerate(document.lines[lineno])
]
return get_line
def main():
answer = prompt("Give me some input: ", lexer=RainbowLexer())
print("You said: %s" % answer)
if __name__ == "__main__":
main()
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