Question

这是我的代码...我已经尝试了计算器给出多种解决方案，但我不能够运行另一个Python文件，该文件是不是在同一个目录

f.py

import os 
print "Start..." 
file='"C:\Users\Mohit\Desktop\ML PROJECT\Practical Session on R\Practical 
Session on R\Session II - Regression\run.py"' 
os.system('python file ') 
print "Done" 

输出：

Fatal error: cannot open file 'file': No such file or directory 

run.py

import os 
print "Start..." 
files=r'"C:\Users\Mohit\Desktop\ML PROJECT\Practical Session on R\Practical 
Session on R\Session II - Regression\decisionTree.R"' 
os.system('Rscript '+files) 
print "Done" 

当我运行run.py时，我得到了期望的结果。

输出：

C:\Users\Mohit\Desktop\ML PROJECT\Practical Session on R\Practical Session 
on R\ 
Session II - Regression>python r.py 
Start... 

START 
elapsed 
    0.17 

Step 1: Library Inclusion 
Step 2: Variable Declaration[1] 
[1] "regressionDataSet.csv" 

Step 3: Data Loading  RMSD 
irNumber 
14395 1.167 5364.27 4616.64 
15435 2.500 25468.10 475274.00 - 
8739 4.039 5921.03 7071.89 
11586 0.000 14192.70 75413.00 
13765 0.000 17432.40 245147.00 - 
10087 3.814 7333.51 26580.70 
[1] 16382 
[1] "RMSD"   "Area" 
[5] "SS"   "ResidueLeng 

Step 4: Counting dataset[1] 1638 

Step 5: Choose Target Variable[1 

Step 6: Choose Inputs Variable[1 
"SS" 
[5] "ResidueLength" "PairNumber" 
[1] 6 

Step 7: Select training dataset 
th PairNumber RMSD 
14395 5364.27 4616.64 -696. 
15435 25468.10 475274.00 -10600. 
8739 5921.03 7071.89 -1658. 
11586 14192.70 75413.00 -7939. 
13765 17432.40 245147.00 -10885. 
10087 7333.51 26580.70 -2746. 
[1] 8191 

Step 8: Select testing dataset 
PairNumber RMSD 
10216 20510.40 254178.0 44500.0 
2385 9981.42 28499.0 -4789.0 
1886 21107.10 192443.0 -4860.0 
13684 17765.00 76543.0 -8164.0 
10319 6308.91 10287.3 -3370.0 
13088 5844.34 11139.7 -1879.7 
[1] 8192 

Step 9: Model Building -> decis 
ength + PairNumber 
n= 8191 

node), split, n, deviance, yval 
    * denotes terminal node 

1) root 8191 23819.88000 2.364 
2) Energy< -6161.885 1592 4 
    4) ResidueLength< 387.5 74 
    8) Energy< -7785.3 262 
    9) Energy>=-7785.3 481 
    5) ResidueLength>=387.5 84 
    10) Energy< -12910.5 173 
    11) Energy>=-12910.5 676 
    22) ResidueLength< 467. 
     44) ResidueLength>=39 
     45) ResidueLength< 39 
    23) ResidueLength>=467. 
3) Energy>=-6161.885 6599 17 
    6) SS< 21.5 1584 3795.813 
    7) SS>=21.5 5015 13126.850 
    14) Energy< -3971.125 163 
    28) ResidueLength< 192. 
    29) ResidueLength>=192. 
     58) ResidueLength< 26 
     116) Energy< -4680.5 
     117) Energy>=-4680.5 
     59) ResidueLength>=26 
    15) Energy>=-3971.125 337 
    30) Area< 8601.98 1655 
     60) Energy< -2933.36 
     61) Energy>=-2933.36 
    31) Area>=8601.98 1721 

Step 10: Prediction using -> de 
13684  10319  13088 
3.24618361 0.51722167 3.10727318 

Step 11: Extracting Actual[1] 3. 

Step 12: Model Evaluation[1] 0.5 
[1] 0.25 
[1] 1.19 
[1] 48.19 
elapsed 
0.53 
null device 
     1 
     modelName r R rm 
elapsed decisionTree 0.5 0.25 1. 

    Step 13: Writing to file 
    Step 14: Saving the Model -> dec 
    Done 
Total Time Taken: 0.53 secDone 

但我得到当我通过f.py

错误运行下面的错误是：

Start... 
    Start... 

    START 
    elapsed 
    0.18 

    Step 1: Library Inclusion 
    Step 2: Variable Declaration[1] "decisionTree" 
    [1] "regressionDataSet.csv" 

    Step 3: Data LoadingError in file(file, "rt") : cannot open the connec 
    Calls: read.csv -> read.table -> file 
    In addition: Warning message: 
    In file(file, "rt") : 
    cannot open file 'regressionDataSet.csv': No such file or directory 

Answer 1

把一个r在你的面前文件路径，以便反斜杠\不会转义您不希望它们的字符串t o被转义（see also this question）。

其次os.system('python file')将字面上执行python file，您的变量没有被使用。

还要确保你的文件路径没有换行符（只有一条长行）。

import os 
print "Start..." 

folder = r'C:\Users\Mohit\Desktop\ML PROJECT\Practical Session on R\Practical Session on R\Session II - Regression' 
file= r'"{}\run.py"'.format(folder) 

os.chdir(folder) 
os.system('python '+file) 

print "Done"