尝试在for循环中动态创建函数/将函数与变量相关联

Question

我的代码从csv读取参数来创建对象(在这种情况下是总线，电源系统中的公共元素)，并将每个对象与一个变量相关联。我正在尝试使用for循环在csv文件中创建与行一样多的总线(列是每个总线的参数)，我认为我已经实现了这一点，因为创建了变量bus0、bus1、bus2等，并且csv中读取的参数的数据帧也在那里，并且可以访问。

但是当我尝试使用这样的变量(bus0，bus1...)为了做其他事情(比如给bus0附加一个生成点)，它一直说"bus0不存在“，尽管我在我的变量窗口中看到了它。我尝试了很多东西，但看起来不起作用，感谢任何帮助，谢谢。我附加了下面的代码片段：

    import pandapower as pp
    import csv

    net = pp.create_empty_network() #create an empty network


    with open('Bus_data_test.csv', 'r') as Bus_data:
         BD = [row for row in csv.reader(Bus_data)]
    print(BD)

    Buses={}

    i=0
    for rows in BD:

        Buses["Bus{0}".format(i)]= pp.create_bus (net, vn_kv=float(BD[i][0]), name=BD[i][1], index=int(i), geodata=None, type=str(BD[i][4]), zone=int(BD[i][5]), in_service=bool(BD[i][6]), max_vm_pu=float(BD[i][7]), min_vm_pu=float(BD[i][8]), coords=BD[i][9])
i=i+1
   print(net.bus)
   print(net.bus.iat[0,5])

    with open('Gen_data.csv', 'r') as Gen_data:
        GD = [row for row in csv.reader(Gen_data)]

    print(GD)  

    Generators={}

     i=0
    for rows in GD:

       Generators["Gen{0}".format(i)] = pp.create_gen(net, GD[i][0], p_mw=GD[i][1], vm_pu=GD[i][2], name=GD[i][3], index=int(i), max_q_mvar=GD[i][7], min_q_mvar=GD[i][8], min_p_mw=GD[i][6], max_p_mw=GD[i][5], scaling=GD[i][9], type=str(GD[i][10]), slack=bool(GD[i][11]), controllable=GD[i][12], in_service=GD[i][13])
       i=i+1
    print(net.gen)

下面是csv的一个片段：

Bus0,230,Bus0,0,None,b,1,True,1.1,0.9,None,bus0,50,30.99,0,0,None,1.0,0,True
Bus1,230,Bus1,1,None,b,1,True,1.1,0.9,None,bus1,170,105.35,0,0,None,1.0,1,True

回溯错误：

C:\Users...lib\site-packages\pandapower\create.py:1177: FutureWarning: elementwise comparison failed; returning scalar instead, but in the future will perform elementwise comparison
  if bus not in net["bus"].index.values:
Traceback (most recent call last):

  File "<ipython-input-11-e022521b4210>", line 1, in <module>
    runfile('C:/Users...Net_reader_test.py', wdir='C:/Users/...Matpower')

  File "C:\Users\...lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 827, in runfile
    execfile(filename, namespace)

  File "C:\Users\...\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 110, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/...Net_reader_test.py", line 41, in <module>
    Generators["Gen{0}".format(i)] = pp.create_gen(net, GD[i][0], p_mw=GD[i][1], vm_pu=GD[i][2], name=GD[i][3], index=int(i), max_q_mvar=GD[i][7], min_q_mvar=GD[i][8], min_p_mw=GD[i][6], max_p_mw=GD[i][5], scaling=GD[i][9], type=str(GD[i][10]), slack=bool(GD[i][11]), controllable=GD[i][12], in_service=GD[i][13])

  File "C:\Users\...\lib\site-packages\pandapower\create.py", line 1178, in create_gen
    raise UserWarning("Cannot attach to bus %s, bus does not exist" % bus)

UserWarning: Cannot attach to bus Bus0, bus does not exist

Answer 1

您可以在Buses中创建以键命名的变量。这不是一件常见的事情，但这里有一个示例。我清理了一些Buses的创建，并省略了其他代码，以便只关注这个问题。

import pandapower as pp
import csv

net = pp.create_empty_network() #create an empty network

Buses = {}
with open('Bus_data_test.csv', 'r') as Bus_data:
    for index, row in enumerate(csv.reader(Bus_data)):
        Buses["Bus{0}".format(index)] = pp.create_bus(net,
            vn_kv=float(row[0]), name=row[1], index=index, 
            geodata=None, type=row[4], zone=int(row[5]),
            in_service=(row[6]=="True"), max_vm_pu=float(row[7]),
            min_vm_pu=float(row[8]), coords=row[9])

assert len(Buses) > 0

# normally one would just use the name in the dict
print(Buses["Bus0"])

# but module level variables can be constructed
for name,value in Buses.items():
    globals()[name.lower()] = value
print(bus0)