read()=-----
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[已关闭问题]
关闭于 2025-09-18 21:42
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文件对象内部维护一个当前位置指针。
一旦指针到达 EOF（End Of File），任何进一步的read()调用都会立即返回空字符串，且指针保持不动——这是 Python 的明文规定。 -
while True: ch = fi.read(1) if ch == "": # 文件读完 break ... # 正常处理这样连“多跑一次”都不会出现。 -
fi = open("小女孩.txt","r") ch = "a" dic = {} while ch: ch = fi.read(1) if ch not in ("\n","\r","。","！","？","”","；"): dic[ch] = dic.get(ch,0)+1
这是为什么dic中有{"":1...}的原因
而用for i in str就没问题。for i in txt:遍历的是已经完整读进内存的字符串，而fi.read(1)是边读文件边遍历。fi = open("小女孩.txt","r") fo = open("PY301-1.txt","w") txt = fi.read() d = {} exclude = "，。！？、（）【】<>《》=：+-*—“”…" for word in txt: if word in exclude: continue else: d[word] = d.get(word,0)+1
