Multiple conditions on pandas dataframe
来源： https://stackoverflow.com/questions/62555995/multiple-conditions-on-pandas-dataframe
logical-and
Python bitand (&) vs and
问题 Hi all I have this part of code: for line in response.body.split("\n"): if line != "": opg = int(line.split(" ")[2]) opc = int(line.split(" ")[3]) value = int(line.split(" ")[5]) if opg==160 & opc==129: ret['success'] = "valore: %s" % (value) self.write(tornado.escape.json_encode(ret)) I have a series if line of type 1362581670 2459546910990453036 156 0 30 0 I want to take only the line where the third and fourth element are respectively 160 and 129. This code doesn't work. Do I have to do
Python bitand (&) vs and
Hi all I have this part of code: for line in response.body.split("\n"): if line != "": opg = int(line.split(" ")[2]) opc = int(line.split(" ")[3]) value = int(line.split(" ")[5]) if opg==160 & opc==129: ret['success'] = "valore: %s" % (value) self.write(tornado.escape.json_encode(ret)) I have a series if line of type 1362581670 2459546910990453036 156 0 30 0 I want to take only the line where the third and fourth element are respectively 160 and 129. This code doesn't work. Do I have to do some casting? I think opg==160 is working to campare int with int... You got confused with the operators;
How does C++ handle &&? (Short-circuit evaluation) [duplicate]
问题 This question already has answers here : Is short-circuiting logical operators mandated? And evaluation order? (7 answers) Closed last year . When encountering a (bool1 && bool2), does c++ ever attempts to check bool2 if bool1 was found false or does it ignore it the way PHP does? Sorry if it is too basic of a question, but I really could not find a mentioning of that neither in Schildt nor on the Internet. 回答1: Yes, the && operator in C++ uses short-circuit evaluation so that if bool1