NameError: name 'jlsession' is not defined

Hi!

I'm very happy to find a DMRG package that uses Python. I've cloned your repo to my Jupyter Notebook and when I run any of your example codes I get this error message: NameError: name 'jlsession' is not defined

It seems like the only common error for all examples. I don't know what it is or how to fix it. Can you please help?

Here's the full error:

C++ backend not found, trying to run with Julia version

NameError Traceback (most recent call last)

in 3 n = 6 # number of different spinless fermionic orbitals 4 # fc is an object that contains the information of the many body system ----> 5 fc = fermionchain.Fermionic_Chain(n) # create the object 6 # h = 0 7 # create random hoppings ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/fermionchain.py in __init__(self, n) 19 # self.N = [self.Cdag[i]*self.C[i] for i in range(n)] 20 self.Id = self.get_operator("Id",1) ---> 21 Many_Body_Chain.__init__(self,[0 for i in range(n)]) 22 self.fermionic = True 23 self.use_ampo_hamiltonian = True # use ampo ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in __init__(self, sites) 83 self.kpm_extrapolate_mode = "plain" # mode of the extrapolation 84 os.system("mkdir -p "+self.path) # create folder for the calculations ---> 85 self.initialize() 86 # and initialize the sites 87 def initialize(self): ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in initialize(self) 89 self.task = {"write_sites":"true"} 90 self.execute(lambda: write_sites(self)) # write the different sites ---> 91 self.run() # run the calculation 92 self.sites_from_file = True 93 def setup_julia(self): ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in run(self, automatic) 270 if not os.path.isfile(mpscpp): # mpscpp.x not found, rerun with julia 271 print("C++ backend not found, trying to run with Julia version") --> 272 self.setup_julia() # turn to Julia 273 return self.run() # rerun with julia 274 from . import cpprun ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in setup_julia(self) 94 """Setup the Julia mode""" 95 self.itensor_version = "julia" ---> 96 self.initialize() 97 def setup_cpp(self): 98 """Setup the Julia mode""" ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in initialize(self) 89 self.task = {"write_sites":"true"} 90 self.execute(lambda: write_sites(self)) # write the different sites ---> 91 self.run() # run the calculation 92 self.sites_from_file = True 93 def setup_julia(self): ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in run(self, automatic) 265 elif self.itensor_version in ["julia","Julia","jl"]: 266 from . import juliarun --> 267 juliarun.run(self) 268 return 269 else: raise ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/juliarun.py in run(self) 27 import contextlib 28 c = "@suppress_out include(\""+dmrgpath+"/mpsjulia/mpsjulia.jl\");" ---> 29 self.execute(lambda: jlsession.eval(c)) # evaluate Julia 30 31 ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/fermionchain.py in execute(self, f) 129 from . import multioperator 130 multioperator.use_jordan_wigner = False --> 131 return Many_Body_Chain.execute(self,f) 132 133 ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/manybodychain.py in execute(self, f) 399 """Execute function in the folder""" 400 self.to_folder() # go to folder --> 401 out = f() 402 self.to_origin() # go back 403 return out # return result ~/dmrgpy/examples/s12_chain/../../src/dmrgpy/juliarun.py in () 27 import contextlib 28 c = "@suppress_out include(\""+dmrgpath+"/mpsjulia/mpsjulia.jl\");" ---> 29 self.execute(lambda: jlsession.eval(c)) # evaluate Julia 30 31 NameError: name 'jlsession' is not defined

joselado / dmrgpy

NameError: name 'jlsession' is not defined #5

C++ backend not found, trying to run with Julia version