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Hanyar Mafi Python

Mafi

单词 "welcome" 在文本中的什么位置？

txt = "Hello, welcome to my world."
x = txt.find("welcome")
print(x)

Yin Mafi

定义和用法

find() 方法查找指定值的首次出现。

如果找不到该值，则 find() 方法返回 -1。

find() 方法与 index() 方法几乎相同，唯一的区别是，如果找不到该值，index() 方法将引发异常。（请看下面的例子）

Yanayi

matan.find(value, start, end)

Argungu

Argungu Kwamfuta
value Daukar. Wuri na neman. Ana gudanar da yankin farko kuma a kai samar da sauki.
start Iyali. Wuri na kai samar da neman. Ana gudanar da yankin farko kuma a kai samar da sauki.
end Iyali. Wuri na kammala neman. Ana gudanar da yankin farko na matan kuma a kai samar da sauki.

Mafi fiye

Mafi

Lokacin farko na harin "e" a cikin matan:

txt = "Hello, welcome to my world."
x = txt.find("e")
print(x)

Yin Mafi

Mafi

Idan a kai iya samun zai a cikin wuri 5 zuwa 10, lokacin da ake samun lokacin farko na harin "e" a cikin matan:

txt = "Hello, welcome to my world."
x = txt.find("e", 5, 10)
print(x)

Yin Mafi

Mafi

Idan a kai iya samun zai, sabon hanyar find() tace -1, amma sabon hanyar index() za a zartar dake:

txt = "Hello, welcome to my world."
print(txt.find("q"))
print(txt.index("q"))

Yin Mafi

Hanyar Mafi Python