tuples

I got a error saying: unsupported operand type(s) for -: 'int' and 'tuple' How do I correct it? from scipy import integrate cpbar = lambda T: (3.826 - (3.979e-3)*T + 24.558e-6*T**2 - 22.733e-9*T**3 + 6.963e-12*T**4)*8.314 deltahbarCH4 = integrate.quad(cpbar,298,1000) var = deltahbarCH4 hRPbar = hRPbar + (deltahbarCO2 + 2*deltahbarH2O - var -2*deltahbarO2) integrate.quad() returns a tuple ; deltahbarCO2 + 2*deltahbarH2O is an integer, you are trying to subtract the var tuple. If you wanted just the integral y of the integrate.quad() result, use the first element of that tuple: var =

After having read for the zillionth time a question about "How do I parse HTML with Regex" on Stackoverflow, I got myself interested again in grammars, grabbed my university scripts and after a few minutes I wondered how I've ever passed my exams. As a simple (well, "simple" I expected it to be) exercise I tried to write a CFG that produces valid python tuples (for simplicity's sake only using the identifiers a , b and c ). After some good time I now came up with this: G = ( {Tuple, TupleItem, Id}, {“a”, “b”, “c”, “,”, “(“, “)”}, P, Tuple) Being P: Tuple → “(“ TupleItem “)” Tuple → “(“

I have following code: class TR_AgentInfo : public tuple< long long, //AgentId string, //AgentIp > { public: TR_AgentInfo() {} TR_AgentInfo( const long long& AgentId, const string& AgentIp, ) { get<0>(*this) = AgentId; get<1>(*this) = AgentIp; } long long getAgentId() const { return get<0>(*this); } void setAgentId(const long long& AgentId) { get<0>(*this) = AgentId; } string getAgentIp() const { return get<1>(*this); } void setAgentIp(const string& AgentIp) { get<1>(*this) = AgentIp; } }; Now I want to use this code: int count = tuple_size<TR_AgentInfo>::value; but gcc give this error: error:

Suppose, var = ('x', 3) How to check if a variable is a tuple with only two elements, first being a type str and the other a type int in python? Can we do this using only one check? I want to avoid this - if isinstance(var, tuple): if isinstance (var[0], str) and (var[1], int): return True return False Here's a simple one-liner: isinstance(v, tuple) and list(map(type, v)) == [str, int] Try it out: >>> def check(v): return isinstance(v, tuple) and list(map(type, v)) == [str, int] ... >>> check(0) False >>> check(('x', 3, 4)) False >>> check((3, 4)) False >>> check(['x', 3]) False >>> check(('x'

I'm new to Python and have looked at quite a bit of documentation to figure out what is going on, but haven't had any luck. I have a list of tuples that I need to convert to lowercase and perform mathematical operations on all values in the list. The "E", needs to become an "e" in order to perform mathematical operations. If there is a single value in a given list of tuples, the following works: EarthU = ['1.3719107E+11', '8.3311764E-02', '2.2719107E+11', '1.4880643E+03'] earthU = [element.lower() for element in EarthU] earthU = [(0.3048*0.3048)*float(element) for element in earthU] If there