Def Syntax Error Python
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posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow python random syntax error Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Python syntax error “def” up vote 1 down vote python def main invalid syntax favorite I am trying to compile this piece of Python code- def isPrime ( n ): if n < 2 : return false for x in range(2,n): if (n % x)==0: return false return true def nthPrime ( n ): y = 0 z = 1 while y< n: z+=1 if isPrime( z ): y+=1 return z But I am having this error in line 9 on
Syntaxerror Bad Input ('def')
"def" SyntaxError: invalid syntax coding-style python-2.7 share|improve this question edited Aug 5 '12 at 19:52 asked Aug 5 '12 at 19:32 Nishit Shuvo 2517 1 Is how the code looks here exactly as it looks on your screen? Your indenting is messed up. –Jeff Gortmaker Aug 5 '12 at 19:35 There is no syntax error in the code you edited to. false and true will presumably raise NameError when you call the functions, though. –geoffspear Aug 5 '12 at 20:04 add a comment| 2 Answers 2 active oldest votes up vote 3 down vote accepted Here's a fixed up version of your code, with proper indenting and using True and False, not true and false: def isPrime( n ): if n < 2 : return False for x in range(2,n): if (n % x)==0: return False return True def nthPrime( n ): y = 0 z = 1 while y < n: z+=1 if isPrime( z ): y+=1 return z And here's a version of your code that conforms more to the PEP 8 style guide for python: def isPrime(n): if n < 2: return False for x in range(2, n): if (n % x) == 0: retu
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If __name__ == '__main__' Invalid Syntax
Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Invalid syntax error in Python up vote 2 http://stackoverflow.com/questions/11819430/python-syntax-error-def down vote favorite I'm starting Comp Sci courses in Uni this coming fall (starting with zero programming knowledge), so I'm just starting to play around programming. I'm following a book and tried copy-pasting some code - but it doesn't work. Here's what I tried: >>> def function(x): return x+2 function(2) SyntaxError: invalid syntax The word "function" was highlighted. I'm confused because the very same example is used in http://stackoverflow.com/questions/11890095/invalid-syntax-error-in-python the book and it appears to work but then I get that error on my end. What's going on here? python syntax-error share|improve this question edited Aug 10 '12 at 1:15 Brighid McDonnell 2,35222049 asked Aug 9 '12 at 18:55 Colly 11112 Good luck with your efforts! Knowing where to ask for help is a good start for anything, and Stack Overflow has lots of help available. I recommend reading existing questions to see how other people are using the language and to get a sense for how Python code looks. –Brighid McDonnell Aug 10 '12 at 1:12 I'll recommend here using mostly the internet to teach yourself programming. Go for docs.python.org and work through the tutorial there. It's how I learned, and I suspect many others who frequent this site. –Droogans Oct 4 '12 at 2:27 add a comment| 4 Answers 4 active oldest votes up vote 4 down vote You need to separate the function definition from its execution. Also, Python is sensitive to whitespace at the beginning of lines. Try this (exactly): def function(x): return x+2 function(2) or, in one line (which you should not do; see the style guidelines): def function(x): ret
I try to define a function as: def do_twice(f(), x)?The full function is:def do_twice(f(), x): f(x) f(x) I want the value x
to pass as a function parameter.UpdateCancelAnswer Wiki1 AnswerAnonymousWritten 198w agoThe parameter is https://www.quora.com/Why-do-I-get-a-syntax-error-when-I-try-to-define-a-function-as-def-do_twice-f-x just f
, the function itself—not f()
, the result of calling the function https://www.codecademy.com/en/forum_questions/55058a339113cbcaab006053 with no arguments.def do_twice(f, x): f(x) f(x) (You may often see f()
written informally to refer to the function itself, but that is an abuse of notation, not real syntax.)681 Views · View UpvotesView More AnswersRelated QuestionsWhy do I get a syntax error when the variables unpacked from a list are on two lines?Hi I syntax error am trying to call a function on change of an attribute of a class, how can i do this in Python?Why is there a syntax error for the expression "He said, "Yes!""?Why do I keep getting and "invalid syntax" error when I use += operator in Python?Python syntax error.....not sure why?Why am I getting syntax error when I'm using end="" in python 3.3?Why am I getting a syntax error?Why does this def syntax error error occur: "Y=def f(x): def g(y): x += 1 return x + y return g f(1) (2) # ERROR!"?Why I keep getting invalid syntax error in Python while using "else" function?How does this function work: [Y=def f(x): def g(y): return x+y return g]?Why does putting print inside a Python lambda function raise a syntax error?Why am I getting an import error if I have the def main?I'm trying to use python in-built function max(). I'm getting "TypeError: 'int' object is not callable" error. How can I use it?Why do I get an attribute error when trying to write to a file in python?If two functions intersect at an argument x then they return equal values at x. How do I implement intersects(), which takes a one-argument fu...How do I modify this Python program so that it gives me the derivative of a function f(x) at point x?What does "syntax error" or "invalid syntax" mean in Python?Why am I getting a syntax error in the command line with this code using Python 2.6?What is def function in python?Why does my function give me an error when I am trying to write to a file?Related QuestionsWhy do I get a syntax error when the variables unpacked from a list are on two li
Forum View Course » View Exercise 1036 points Submitted by James M over 1 year ago "def" Invalid Syntax? There seems to be an error with this bit of code. def get_class_average(students): For some reason or another I cannot see the mistake. The console returns this. File "python", line 47 def get_class_average(students): ^ SyntaxError: invalid syntax I an not sure why, it seems correct. Here is the full code. I would appreciate any help. Thanks lloyd = { "name": "Lloyd", "homework": [90.0, 97.0, 75.0, 92.0], "quizzes": [88.0, 40.0, 94.0], "tests": [75.0, 90.0] } alice = { "name": "Alice", "homework": [100.0, 92.0, 98.0, 100.0], "quizzes": [82.0, 83.0, 91.0], "tests": [89.0, 97.0] } tyler = { "name": "Tyler", "homework": [0.0, 87.0, 75.0, 22.0], "quizzes": [0.0, 75.0, 78.0], "tests": [100.0, 100.0] } students = [lloyd, alice, tyler] # Add your function below! def average(numbers): total = sum(numbers) total = float(total) total = total / len(numbers) return total def get_average(student): homework = average(student["homework"]) quizzes = average(student["quizzes"]) tests = average(student["tests"]) return (homework * .1 + quizzes * .3 + tests * .6) def get_letter_grade(score): if score >= 90: return "A" elif score >= 80: return "B" elif score >= 70: return "C" elif score >= 60: return "D" else: return "F" print get_letter_grade(get_average(lloyd) def get_class_average(students): results = [] for student in students: results.append(get_average(student)) return average(results) 1 vote permalink it points where it stops making sense. something you did above doesn't allow you to create a function now, such as not closing brackets 1577 points Submitted by Jonatan over 1 year ago 1 Comment James M over 1 year ago Yes, thanks. That was part of the problem. 1 vote permalink Try removing the return statement from the for loop. 488 points Submitted by blob18071807 over 1 year ago 1 Comment James M over 1 year ago Thanks will do. 1 vote permalink Ok, thanks. I will try it. 1036 points Submitted by James M over 1 year ago 1 vote permalink It looks like you didn't fully close the bracket in print get_letter_grade(get_average(lloyd) Add a ) to the end.. 966 points Submitted by Craig Wessel over 1 year ago 1 Comment James M over 1 year ago Thanks, that was part of the problem.