sndwch 0.2.0

A tool for easily manipulating strings with patterns using the "Sandwich Method"

English description follows Japanese.

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概要

• 正規表現よりも簡単な書き方で文字列のパターン的操作ができるツール

特徴

• 所定文字列で挟むことによって操作箇所を示す、正規表現よりも敢えて自由度が限定された「Sandwitch Method」に基づく
• この限定により、パターンマッチで頻出の「"」などの記号のエスケープが不要になる
• 文字列操作で頻出の最短一致がデフォルトになっている

使い方

import sndwch

# 所定の文字列で挟まれた部分を全て取得 [sndwch]
results = sndwch.get("a = {col='orange', col='green'}", "col='", "'")
print(results)	# -> ["orange", "green"]

# 所定の文字列で挟まれた部分を全て置き換え [sndwch]
result = sndwch.rep(
	"a = {col='orange', col='green'}",	# 操作対象の文字列
	"col='", "'",	# 操作箇所を示すパターン (前方, 後方)
	lambda s: s.upper(),	# 操作関数
	outer = False,	# False: 引数・返値にpreとpostを含まない, True: 返値のみpreとpostを含む
)
print(result)	# -> "a = {col='ORANGE', col='GREEN'}"

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Overview

• A tool that allows pattern-based string manipulation with a simpler syntax than regular expressions.

Features

• Based on the deliberately restricted "Sandwich Method," where target segments are indicated by enclosing them with specified strings, offering less flexibility than regular expressions on purpose.
• This restriction eliminates the need to escape frequently occurring symbols (like ") in pattern matching.
• Shortest match (non-greedy matching) is the default behavior, which is common in string manipulation tasks.

Usage

import sndwch

# Retrieve all substrings enclosed by specified strings [sndwch]
results = sndwch.get("a = {col='orange', col='green'}", "col='", "'")
print(results)	# -> ["orange", "green"]

# Replace all substrings enclosed by specified strings [sndwch]
result = sndwch.rep(
	"a = {col='orange', col='green'}",	# Target string
	"col='", "'",	# Pattern indicating the target area (prefix, suffix)
	lambda s: s.upper(),	# Function to apply
	outer = False,	# False: pre and post are excluded in args & return value, True: included only in return value
)
print(result)	# -> "a = {col='ORANGE', col='GREEN'}"