[Solved] Shorthand ‘if’ is throwing a syntax error
The Python if ternary operator syntax requires an else, like so: x = 2 if y < 5 else 4 solved Shorthand ‘if’ is throwing a syntax error
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[Solved] Python Logical Operators
The operator and returns the last element if no element is False (or an equivalent value, such as 0). For example, >>> 1 and 4 4 # Given that 4 is the last element >>> False and 4 False # Given that there is a False element >>> 1 and 2 and 3 3 # … Read more
[Solved] Python Object Comparisons
What Im not sure about is what methods I need to use to compare the vectors. I tried googling it but couldn’t find anything. Does python have some methods to override < > <= and so on? Yes, Python has magic methods which are exactly for this purpose. You’re already using magic methods, such as … Read more
[Solved] Explain the output of this code with nested ranges
>>> X = range(4, 7) # List of number from 4 to 6 >>> Y = range(2) # List of number from 0 to 1 >>> X [4, 5, 6] >>> Y [0, 1] >>> X[2] = Y # Stored ‘Y’ at X[2] in place of ‘6’ # X[2] is referencing Y >>> X [4, … Read more
[Solved] how to tell an infinite loop to end once one number repeats twice in a row (in python 3.4)
The following is a working example. With comments in the code so you can better understand each step. # import required to use randint import random # holds the last number to be randomly generated previous_number = None while True: # infinite loop # generates a random number between 1 and 6 num = random.randint(1, … Read more
[Solved] Function to switch between two frames in tkinter
You shouldn’t put any logic in a lambda. Just create a normal function that has any logic you want, and call it from the button. It’s really no more complicated that that. class SomePage(…): def __init__(…): … button1 = tk.Button(self, text=”Back to Home”, command=lambda: self.maybe_switch_page(StartPage)) … def maybe_switch_page(self, destination_page): if …: self.controller.show_frame(destination_page) else: … If … Read more
[Solved] Python: Why do I get u’ in the list output? [duplicate]
The u indicates, that the variable is saved as unicode. See https://docs.python.org/2/howto/unicode.html 2 solved Python: Why do I get u’ in the list output? [duplicate]
[Solved] Python 3.3 socket programming error [closed]
print() returns None in Python 3. So, you’re trying to concatenate(or add) None with msg, which results in an error. Try string formatting: print (“Message from server : {}”.format(msg)) 3 solved Python 3.3 socket programming error [closed]
[Solved] List in list changes but var in list not? [duplicate]
The problem you’re experiencing is due to a misunderstanding of lists, list-references, and possibly the concept of mutability. In your case, you are binding the name user_data to a list object. In other words, user_data acts as a list-reference to the actual list object in memory. When you say user_list.append(user_data), all you’re doing is appending … Read more
[Solved] Calculate s = 1 / sin1 + 1 / (sin1 + sin2) + … 1 / sin (1 + .. n)
Do you mean this? import math n = int(input(“Enter n: “)) i = 1 s = 0 while i <= n: s += 1/math.sin(sum(range(1,i+1))) i += 1 print(s) If you want to see each item during iterations import math n = int(input(“n = “)) i = 1 s = 0 while i <= n: r … Read more
[Solved] Can I change the dtype of mean function in Pandas? I want to change it to int type [closed]
You can then apply a transformation to the result. df[‘mean’] = df[‘mean’].apply(lambda x: round(x)) or, if you want to truncate: df[‘mean’] = df[‘mean’].apply(lambda x: int(x)) 0 solved Can I change the dtype of mean function in Pandas? I want to change it to int type [closed]
[Solved] How to extract an alphanumeric string from a sentence if a starting point and end point is given [closed]
Using regex Code import re def extract(text): ”’ extract substring ”’ pattern = r’^G.*[794]’ # pattern ends in 7, 9, 4 # Find pattern in text m = re.match(pattern, text) # find pattern in string if m: # Found pattern substring # Remove space, \, (, – by replacing with empty string m = re.sub(r'[ … Read more
[Solved] Extract numbers, letters, or punctuation from left side of string column in Python
Use Series.str.extract with DataFrame.pop for extract column: pat = r'([\x00-\x7F]+)([\u4e00-\u9fff]+.*$)’ df[[‘office_name’,’company_info’]] = df.pop(‘company_info’).str.extract(pat) print (df) id office_name company_info 0 1 05B01 北京企商联登记注册代理事务所(通合伙) 1 2 Unit-D 608 华夏启商(北京企业管理有限公司) 2 3 1004-1005 北京中睿智诚商业管理有限公司 3 4 17/F(1706) 北京美泰德商务咨询有限公司 4 5 A2006~A2007 北京新曙光会计服务有限公司 5 6 2906-10 中国建筑与室内设计师网 11 solved Extract numbers, letters, or punctuation from left side of string … Read more
[Solved] python IndentationError: expected an indented block [closed]
You have no indentation in your Python code! def datasource(cluster,user,password,url,env,jdbc_driver,timeOut,maxConn,minConn,reapTime,unusdTimeout,agedTimeout): #Declare global variables global AdminConfig global AdminControl Fixing this, there will be others. The next one to fix is: if len(Serverid) == 0: print “Cluster doesnot exists ” else: print “Cluster exist:”+ cluster and so on. 1 solved python IndentationError: expected an indented block [closed]
[Solved] AttributeError: ‘NoneType’ object has no attribute ‘current’
At the moment you call: print self,self.parent.current the LoginScreen is not instantiated yet, so you are calling for and object that does not exist. The workaround is to delay the call by 1 frame, that can be done using Clock class: Clock.schedule_once(self._myprintfunction, 1/60) and latter in your code but in the same class: def _myprintfunction(self, … Read more