Merge pull request #2088 from stared/patch-1

Statistical computing with Python - PEP8 fixes

pythonstatcomp.html.markdown

@@ -9,6 +9,8 @@ This is a tutorial on how to do some typical statistical programming tasks using
 
 ```python
 
+
+
 # 0. Getting set up ====
 
 """ Get set up with IPython and pip install the following: numpy, scipy, pandas,
@@ -35,7 +37,7 @@ r.text # raw page source
 print(r.text)  # prettily formatted
 # save the page source in a file:
 os.getcwd()  # check what's the working directory
-f = open("learnxinyminutes.html","wb")
+f = open("learnxinyminutes.html", "wb")
 f.write(r.text.encode("UTF-8"))
 f.close()
 
@@ -44,7 +46,7 @@ fp = "https://raw.githubusercontent.com/adambard/learnxinyminutes-docs/master/"
 fn = "pets.csv"
 r = requests.get(fp + fn)
 print(r.text)
-f = open(fn,"wb")
+f = open(fn, "wb")
 f.write(r.text.encode("UTF-8"))
 f.close()
 
@@ -58,7 +60,9 @@ f.close()
     you've used R, you will be familiar with the idea of the "data.frame" already.
 """
 
-import pandas as pd, numpy as np, scipy as sp
+import pandas as pd
+import numpy as np
+import scipy as sp
 pets = pd.read_csv(fn)
 pets
 #        name  age  weight species
@@ -86,7 +90,7 @@ pets.age[0:2]
 # 0    3
 # 1    6
 
-sum(pets.age)*2 # 28
+sum(pets.age) * 2  # 28
 max(pets.weight) - min(pets.weight)  # 20
 
 """ If you are doing some serious linear algebra and number-crunching, you may
@@ -96,7 +100,8 @@ max(pets.weight) - min(pets.weight) # 20
 
 # 3. Charts ====
 
-import matplotlib as mpl, matplotlib.pyplot as plt
+import matplotlib as mpl
+import matplotlib.pyplot as plt
 %matplotlib inline
 
 # To do data vizualization in Python, use matplotlib
@@ -105,13 +110,17 @@ plt.hist(pets.age);
 
 plt.boxplot(pets.weight);
 
-plt.scatter(pets.age, pets.weight); plt.xlabel("age"); plt.ylabel("weight");
+plt.scatter(pets.age, pets.weight)
+plt.xlabel("age")
+plt.ylabel("weight");
 
 # seaborn sits atop matplotlib and makes plots prettier
 
 import seaborn as sns
 
-plt.scatter(pets.age, pets.weight); plt.xlabel("age"); plt.ylabel("weight");
+plt.scatter(pets.age, pets.weight)
+plt.xlabel("age")
+plt.ylabel("weight");
 
 # there are also some seaborn-specific plotting functions
 # notice how seaborn automatically labels the x-axis on this barplot
@@ -141,7 +150,7 @@ ggplot(aes(x="age",y="weight"), data=pets) + geom_point() + labs(title="pets")
 url = "https://raw.githubusercontent.com/e99n09/R-notes/master/data/hre.csv"
 r = requests.get(url)
 fp = "hre.csv"
-f = open(fp,"wb")
+f = open(fp, "wb")
 f.write(r.text.encode("UTF-8"))
 f.close()
 
@@ -185,8 +194,9 @@ rx = re.compile(r'\d+$') # match trailing digits
       - http://stackoverflow.com/questions/11860476/how-to-unlist-a-python-list
       - http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.html
 """
+
 def extractYear(v):
-    return(pd.Series(reduce(lambda x,y: x+y,map(rx.findall,v),[])).astype(int))
+    return(pd.Series(reduce(lambda x, y: x + y, map(rx.findall, v), [])).astype(int))
 
 hre["BirthY"] = extractYear(hre.Birth)
 hre["DeathY"] = extractYear(hre.Death)
@@ -199,7 +209,7 @@ sns.lmplot("BirthY", "EstAge", data=hre, hue="Dynasty", fit_reg=False);
 
 # use scipy to run a linear regression
 from scipy import stats
-(slope,intercept,rval,pval,stderr)=stats.linregress(hre.BirthY,hre.EstAge)
+(slope, intercept, rval, pval, stderr) = stats.linregress(hre.BirthY, hre.EstAge)
 # code source: http://wiki.scipy.org/Cookbook/LinearRegression
 
 # check the slope
@@ -223,6 +233,7 @@ sns.lmplot("BirthY", "EstAge", data=hre);
     To see a version of the Holy Roman Emperors analysis using R, see
       - http://github.com/e99n09/R-notes/blob/master/holy_roman_emperors_dates.R
 """
+
 ```
 
 If you want to learn more, get _Python for Data Analysis_ by Wes McKinney. It's a superb resource and I used it as a reference when writing this tutorial.