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Need to read multiple items without a fixed amount, in c++ just do while (Cin >> str) what would be an equivalent python code? has an answer in English to this same question here in the stack, but the answer is incorrect.
an example in c++:
int main() {
string str;
while (cin >> str) {
cout<<str;
}
return 0;
}
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In Python, the default entry is visible as an open text file in the object sys.stdin
If the file was redirected from another, the end of file will be detected on sys.stdin - without redirecting, as in the C++ example, the program is forever waiting for new lines.
Thus, a common file method such as readlines() can automatically read all lines of standard input. What it doesn’t do is convert the read content to some type - Python, with all the expressiveness it has, doesn’t have many "magic" in the syntax - you can use a list comprehension or the function map to convert all read lines to integer.
For example:
import sys
dados = map(int, sys.stdin)
Ready - just this - the map asks for an iterable object in the second argument - a text file, when iterated, emits (yields) one line at a time. That line is passed to the flame int, that despises white-space characters - including the newline that comes in the line vinal. In short: dados becomes a generating object that can be used in a for, or may be transformed into a list of dados = list(dados) .
The syntax with list comprehension is:
import sys
dados = [int(linha) for linha in sys.stdin]
could you adapt to String please? I’m working with them.
For string you don’t need to transform the value - just do dados=list(sys.stdin), or dados = sys.stdin.readlines() . Only if you want to remove end-of-line characters - \n, that needs to be dados = [linha.strip() for linha in sys.stdin()]
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Axei the vague question, could put an example in c++, to make the analogy with python,
– Octávio Santana
friend edited the question.
– WLopesMTB