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    "# Projectq Tutorials\n",
    "\n",
    "Due to the very different nature of how projectq works, we only implemented a wrapper around their `MainEngine`. But instead of simulating the circuit on the fly, it only creates a QLM circuit progressively, it can then output the QLM circuit using the `projectq_to_qlm` method.\n",
    "\n",
    "\n",
    "## Projectq to QLM conversion\n",
    "\n",
    "Here is an example that shows how one can convert projectq circuits into QLM circuits."
   ]
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   "source": [
    "from projectq.cengines import MainEngine\n",
    "from projectq.ops import H, CX, All, Measure\n",
    "\n",
    "from qat.interop.projectq.converters import AqasmPrinter, AqasmEngine\n",
    "\n",
    "# this first engine is only used as a workaround for some issues\n",
    "# only engine you should be interacting with is the AqasmEngine\n",
    "aq = AqasmPrinter(MainEngine)\n",
    "eng = AqasmEngine(aq, engine_list=[aq])\n",
    "\n",
    "qreg = eng.allocate_qureg(2)\n",
    "\n",
    "H | qreg[0]\n",
    "CX | (qreg[0], qreg[1])\n",
    "\n",
    "All(Measure) | qreg\n",
    "\n",
    "# Generate the QLM circuit with the to_qlm_circ method\n",
    "qlm_circuit = eng.projectq_to_qlm()\n",
    "\n",
    "from qat.core.util import extract_syntax\n",
    "\n",
    "for entry in qlm_circuit.ops:\n",
    "    # no need to print measures\n",
    "    if entry.gate is None:\n",
    "        continue\n",
    "    print(\"Gate {} with params {} on qbits {}\"\n",
    "          .format(*extract_syntax(qlm_circuit.gateDic[entry.gate],\n",
    "                                qlm_circuit.gateDic), entry.qbits))"
   ]
  }
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  "authors": [
   "Simon Martiel",
   "Arnaud Gazda"
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