blocks|key|2505128|text|在CPython实现中，相关的检查由_PyEval_EvalCodeWithName函数执行。例如，下面是check+for+the+number+of+positional+arguments|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2505129|下面是参考图的一部分：|2505130|2505131|_PyEval_EvalCodeWithName|unordered-list-item|2505132|​|2505133|PyEval_EvalCodeEx|2505134|2505135|2505136|2505137|2505138|2505139|2505140|PyEval_EvalCode|2505141|2505142|2505143|2505144|2505145|2505146|2505147|2505148|2505149|2505150|run_eval_code_obj|2505151|2505152|2505153|2505154|2505155|2505156|2505157|2505158|2505159|2505160|2505161|2505162|2505163|run_mod|2505164|2505165|2505166|2505167|2505168|2505169|2505170|2505171|2505172|2505173|2505174|2505175|2505176|2505177|2505178|run_pyc_file|2505179|2505180|2505181|2505182|2505183|2505184|2505185|2505186|2505187|2505188|2505189|2505190|2505191|2505192|2505193|2505194|PyRun_SimpleFileExFlags|2505195|2505196|2505197|2505198|2505199|2505200|2505201|2505202|2505203|2505204|2505205|2505206|2505207|2505208|2505209|exec_code_in_module|2505210|2505211|2505212|2505213|2505214|2505215|2505216|2505217|2505218|2505219|_PyFunction_FastCallDict|2505220|2505221|2505222|2505223|2505224|2505225|2505226|function_call|2505227|2505228|2505229|2505230|2505231|2505232|2505233|2505234|2505235|2505236|PyFunction_Type|2505237|2505238|2505239|2505240|2505241|2505242|2505243|2505244|2505245|2505246|2505247|2505248|2505249|PyFunction_NewWithQualName|2505250|2505251|2505252|2505253|2505254|2505255|2505256|2505257|2505258|2505259|2505260|2505261|2505262|2505263|2505264|2505265|PyFunction_New|2505266|2505267|2505268|2505269|2505270|2505271|2505272|2505273|2505274|2505275|2505276|2505277|2505278|2505279|2505280|2505281|2505282|2505283|func_new_impl|2505284|2505285|2505286|2505287|2505288|2505289|2505290|2505291|2505292|2505293|2505294|2505295|2505296|2505297|2505298|2505299|2505300|2505301|2505302|2505303|func_new|2505304|2505305|2505306|2505307|2505308|2505309|2505310|2505311|2505312|2505313|2505314|2505315|2505316|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4045|1|https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4185|2|3|https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4321|4|https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L716|5|https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L1096|6|https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L1127|7|https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L1147|8|https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L374|9|https://github.com/python/cpython/blob/0fd2c300c2a85b3b227a907b2a39ef79fa86d850/Python/import.c#L976|10|https://github.com/python/cpython/blob/fb9423fd0a85f06affb8c3a8f25dd598a649aa42/Objects/call.c#L299|11|https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L626|12|https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L647|13|https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L13|14|https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L78|15|https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L500|16|https://github.com/python/cpython/blob/3191391515824fa7f3c573d807f1034c6a28fab3/Objects/clinic/funcobject.c.h#L27^0|I|O|0|1H|18|1|0|0|0|0|O|2|0|1|0|H|3|1|0|0|0|0|1|2|0|F|4|2|1|0|0|0|0|0|1|2|3|0|H|5|3|2|1|0|0|0|0|0|0|1|2|3|4|0|7|6|4|3|2|1|0|0|0|0|0|0|0|1|2|3|4|0|C|7|4|3|2|1|0|0|0|0|0|0|0|1|2|3|4|4|0|N|8|4|3|2|1|0|0|0|0|0|0|0|0|1|2|3|0|J|9|3|2|1|0|0|0|0|0|0|1|0|O|A|1|0|0|0|0|1|2|0|D|B|2|1|0|0|0|0|0|1|2|3|0|F|C|3|2|1|0|0|0|0|0|0|1|2|3|4|0|Q|D|4|3|2|1|0|0|0|0|0|0|0|1|2|3|4|4|0|E|E|4|3|2|1|0|0|0|0|0|0|0|0|1|2|3|4|4|4|0|D|F|4|3|2|1|0|0|0|0|0|0|0|0|0|1|2|3|4|4|4|4|0|8|G|4|3|2|1|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|75|8|@]|9|@$A|76|B|77|1|78]|$A|79|B|7A|1|7B]]|C|$]]|$1|D|3|E|5|6|7|7C|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|7D|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|7E|8|@]|9|@$A|7F|B|7G|1|7H]]|C|$]]|$1|J|3|K|5|I|7|7I|8|@]|9|@]|C|$]]|$1|L|3|M|5|I|7|7J|8|@]|9|@$A|7K|B|7L|1|7M]]|C|$]]|$1|N|3|-4|5|6|7|7N|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|7O|8|@]|9|@]|C|$]]|$1|P|3|K|5|6|7|7P|8|@]|9|@]|C|$]]|$1|Q|3|-4|5|6|7|7Q|8|@]|9|@]|C|$]]|$1|R|3|K|5|I|7|7R|8|@]|9|@]|C|$]]|$1|S|3|K|5|I|7|7S|8|@]|9|@]|C|$]]|$1|T|3|U|5|I|7|7T|8|@]|9|@$A|7U|B|7V|1|7W]]|C|$]]|$1|V|3|-4|5|6|7|7X|8|@]|9|@]|C|$]]|$1|W|3|-4|5|6|7|7Y|8|@]|9|@]|C|$]]|$1|X|3|-4|5|6|7|7Z|8|@]|9|@]|C|$]]|$1|Y|3|K|5|6|7|80|8|@]|9|@]|C|$]]|$1|Z|3|K|5|6|7|81|8|@]|9|@]|C|$]]|$1|10|3|-4|5|6|7|82|8|@]|9|@]|C|$]]|$1|11|3|K|5|I|7|83|8|@]|9|@]|C|$]]|$1|12|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In CPython implementation, the checks in question are performed by the 
<a href="https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4045" rel="nofollow noreferrer">_PyEval_EvalCodeWithName</a> function. For example here is the <a href="https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4185" rel="nofollow noreferrer">check for the number of positional arguments</a>

Here is a part of the reference graph:

<ul>
<li><a href="https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4045" rel="nofollow noreferrer">_PyEval_EvalCodeWithName</a></li>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L4321" rel="nofollow noreferrer">PyEval_EvalCodeEx</a></li>
</ul></li>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/9ddb77741e041966d64739353393bcba33cc3bdd/Python/ceval.c#L716" rel="nofollow noreferrer">PyEval_EvalCode</a></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L1096" rel="nofollow noreferrer">run_eval_code_obj</a></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L1127" rel="nofollow noreferrer">run_mod</a></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L1147" rel="nofollow noreferrer">run_pyc_file</a></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/44bfff2ec220f2e0291150a776d4d77af7c821ef/Python/pythonrun.c#L374" rel="nofollow noreferrer">PyRun_SimpleFileExFlags</a></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/0fd2c300c2a85b3b227a907b2a39ef79fa86d850/Python/import.c#L976" rel="nofollow noreferrer">exec_code_in_module</a></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/fb9423fd0a85f06affb8c3a8f25dd598a649aa42/Objects/call.c#L299" rel="nofollow noreferrer">_PyFunction_FastCallDict</a></li>
</ul></li>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L626" rel="nofollow noreferrer">function_call</a></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L647" rel="nofollow noreferrer">PyFunction_Type</a></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L13" rel="nofollow noreferrer">PyFunction_NewWithQualName</a></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
<li><a href="https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L78" rel="nofollow noreferrer">PyFunction_New</a></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
<li><ul>
<li><ul>
<li><ul>
<li><ul>
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<li><ul>
<li><a href="https://github.com/python/cpython/blob/530f506ac91338b55cf2be71b1cdf50cb077512f/Objects/funcobject.c#L500" rel="nofollow noreferrer">func_new_impl</a></li>
</ul></li>
</ul></li>
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</ul></li>
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<li><ul>
<li><a href="https://github.com/python/cpython/blob/3191391515824fa7f3c573d807f1034c6a28fab3/Objects/clinic/funcobject.c.h#L27" rel="nofollow noreferrer">func_new</a></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul></li>
</ul>

When you call python function, it checks the arguments and raises <code>TypeError</code>s if you pass something that does not correspond to the function signature:

<ul>
<li><code>A takes from X to Y positional arguments but Z were given</code></li>
<li><code>got multiple values for argument X</code></li>
<li><code>got an unexpected keyword argument</code></li>
</ul>

etc.

I want to see the code that performs those checks, so that I better understand how and when python performs them.

Where is the source of the python code that checks the function arguments?

当你调用python函数时，它会检查参数，如果你传递了一些与函数签名不对应的东西，就会引发TypeError：A takes from X to Y positional arguments but Z were givengot multiple values for argument Xgot an unexpected keyword argument等。我想看看执行这些检查的代码，这样我就

问检查函数参数的python代码的源代码在哪里？
EN

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问检查函数参数的python代码的源代码在哪里？EN