python - Adding the result of an array in a csv file -

i tried make algorithm: random draw between 0 , 1(tir).si tir '<'pred xestime2= 1 else xestime2=0. wish apply algorithm in df ['x3'] had 0 in values ​​of x3 columns. explains thats have error in code. coding:

df = pd.read_csv(fname3, header=none) print df[:15] df['x2'] = df['x1'].round() print df[:15] s = stringio() df.to_csv("c:/users/lenovo/desktop/nouveau dossier (2)/resultats2.csv", header=none, index=false) #print(s.getvalue())  ##########################################"""""""" row in df['x1']:     x = np.random.randint(0,2,10)     row1 in x:         if row1 < row:             df['x3']=0         else:             df['x3']=1         #print df[:15] df.to_csv("c:/users/lenovo/desktop/nouveau dossier (2)/resultats2.csv", header=none, index=false) 

since you've tagged pandas, i'll use read_csv:

in [1]: df = pd.read_csv('foo.csv', header=none)  in [2]: df out[2]:     0         1 0  0  0.487130 1  0  0.248932 2  0  0.248932 3  1  0.405285 4  1  0.405285 5  1  0.405285 6  1  0.405285 

then can round column (to nearest 1):

in [3]: df[2] = df[1].round()  in [4]: df out[4]:     0         1  2 0  0  0.487130  0 1  0  0.248932  0 2  0  0.248932  0 3  1  0.405285  0 4  1  0.405285  0 5  1  0.405285  0 6  1  0.405285  0 

if values on half, they'd rounded 1.

since asked sending stringio, it's same file:

in [11]: s = stringio()  in [12]: df.to_csv(s, header=none, index=false) # alternatively write file df.to_csv('foo.csv', header=none, index=false)  in [13]: print(s.getvalue()) 0.0,0.4871303471776849,0.0 0.0,0.2489319061991417,0.0 0.0,0.2489319061991417,0.0 1.0,0.4052854182229446,0.0 1.0,0.4052854182229446,0.0 1.0,0.4052854182229446,0.0 1.0,0.4052854182229446,0.0