series

I use Pandas 'ver 0.12.0' with Python 2.7 and have a dataframe as below: df = pd.DataFrame({'id' : [123,512,'zhub1', 12354.3, 129, 753, 295, 610], 'colour': ['black', 'white','white','white', 'black', 'black', 'white', 'white'], 'shape': ['round', 'triangular', 'triangular','triangular','square', 'triangular','round','triangular'] }, columns= ['id','colour', 'shape']) The id Series consists of some integers and strings. Its dtype by default is object . I want to convert all contents of id to strings. I tried astype(str) , which produces the output below. df['id'].astype(str) 0 1 1 5 2 z 3 1 4

Why do we use 'loc' for pandas dataframes? it seems the following code with or without using loc both compile anr run at a simulular speed %timeit df_user1 = df.loc[df.user_id=='5561'] 100 loops, best of 3: 11.9 ms per loop or %timeit df_user1_noloc = df[df.user_id=='5561'] 100 loops, best of 3: 12 ms per loop So why use loc? Edit: This has been flagged as a duplicate question. But although pandas iloc vs ix vs loc explanation? does mention that * you can do column retrieval just by using the data frame's getitem : * df['time'] # equivalent to df.loc[:, 'time'] it does not say why we use loc,

I am trying to learn Python programming, and I'm pretty new at this. I was having issues in printing a series of prime numbers from one to hundred. I can't figure our what's wrong with my code. Here's what I wrote; it prints all the odd numbers instead of primes: for num in range(1,101): for i in range(2,num): if (num%i==0): break else: print(num) break Igor Chubin You need to check all numbers from 2 to n-1 (to sqrt(n) actually, but ok, let it be n). If n is divisible by any of the numbers, it is not prime. If a number is prime, print it. for num in range(2,101): prime = True for i in range(2

I have an XYPlot on which are series and a couple of dynamically added shape annotations with no fill (hence each of the series points are visible). Is it possible to display the series tool tips(that show the coordinate of the series point over which the mouse pointer is currently pointing to) over the annotations? Or how can I re-arrange the elements in order to make the tooltip visible. I suspect you are adding the shape annotations to the plot, where they are drawn last. Instead, add them to the renderer in Layer.BACKGROUND . As shown below, the circle does not obscure the tool tip at (20,