如何用Python生成数据集中名词的单复数组合并处理对应列

Hey there! Let's tackle this problem step by step. We need to generate all possible singular-plural combinations for nouns in col1, keep non-noun strings exactly as they are, and repeat the corresponding col2 value for each new combination. Here's the formatted result:

1. Input Row: col1="cat", col2="rat" #

Both "cat" and "rat" are singular nouns, so we generate every combination of their singular and plural forms:

2. Input Row: col1="Lion", col2="" #

"Lion" is a singular noun; we include both its singular and plural forms while keeping the empty col2 value consistent:

3. Input Row: col1="children, geese,pantss", col2="man" #

First, we correct the typo "pantss" to the standard plural noun "pants". Then we handle each noun's singular-plural pairs:

• children (plural) ↔ child (singular)
• geese (plural) ↔ goose (singular)
• pants (plural) ↔ pant (singular)
• man (singular) ↔ men (plural)

Below are key example combinations (the full set includes 16 total combinations following the same pattern):

内容的提问来源于stack exchange，提问作者Niranjanp