You’re trying to open each file twice! First you do: and then you pass infile (which is a file object) to the open function again: open is of course expecting its first argument to be a file name, not an opened file! Open the file once only and you should be fine.[
Assuming the CSV file is delimited with commas, the simplest way using the csv module in Python 3 would probably be: You can specify other delimiters, such as tab characters, by specifying them when creating the csv.reader: For Python 2, use open(‘testfile.csv’, ‘rb’) to open the file.[
BrenBarn is correct. The error means you tried to do something like None[5]. In the backtrace, it says self.imageDef=self.values[2], which means that your self.values is None. You should go through all the functions that update self.values and make sure you account for all the corner cases.
I’m working on making a URL shortener for my site, and my current plan (I’m open to suggestions) is to use a node ID to generate the shortened URL. So, in theory, node 26 might be short.com/z, node 1 might be short.com/a, node 52 might be short.com/Z, and node 104 might be short.com/ZZ. When a … Read more
Actually you should call it (since there is method).
The error is due to matplotlib’s inability to find the location of x-axis value along the x-axis. The plot from the first two lines has numeric values for x-axis, whereas the third line is trying to plot a datetime on the same axis. While plotting the third line plt.plot(Dates, Highs), matplotlib tries to find the x-axis location for … Read more
You can’t do because you have an __init__ method that does NOT take user as argument. You need something like Update But, as bruno has already said it, Django’s models.Model subclass’s initializer is best left alone, or should accept *args and **kwargs matching the model’s meta fields. So, following better principles, you should probably have something like Note – If you weren’t using temp as a keyword argument, e.g. LivingRoom(65), then … Read more
You can use ndiff in the difflib module to do this. It has all the information necessary to convert one string into another string. A simple example: prints:
Let’s try str.split and str.join: Output:
Yes. It’s called a tuple. So, instead of [1,2] which is a list and which can be mutated, (1,2) is a tuple and cannot. Further Information: A one-element tuple cannot be instantiated by writing (1), instead, you need to write (1,). This is because the interpreter has various other uses for parentheses. You can also do away with parentheses altogether: 1,2 is the same as (1,2) Note that a tuple is … Read more