Email Alert Error

Hi,
I have created a workflow for Purchase Order, in which I have defined different workflow states of PO.

Now I want that at a particular workflow state the user receive a mail.

I have done something but it is showing me error which is shown below.

Traceback (innermost last):
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/widgets/form/save.py”, line 18, in savedocs
doc.save()
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 216, in save
self.run_post_save_methods()
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 449, in run_post_save_methods
self.run_method(“on_update”)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 412, in run_method
return Document.hook(fn)(self, *args, **kwargs)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 496, in composer
return composed(self, method, *args, **kwargs)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 481, in runner
add_to_return_value(self, f(self, method, *args, **kwargs))
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/core/doctype/email_alert/email_alert.py”, line 58, in trigger_email_alerts
evaluate_alert(doc, alert, eevent)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/core/doctype/email_alert/email_alert.py”, line 78, in evaluate_alert
if not eval(recipient.condition, context):
File “”, line 1
doc.workflow_state=‘Submit for Technical Approval’
^
SyntaxError: invalid syntax

Traceback (innermost last):
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/app.py”, line 50, in application
response = frappe.handler.handle()
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/handler.py”, line 66, in handle
execute_cmd(cmd)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/handler.py”, line 89, in execute_cmd
ret = frappe.call(method, **frappe.form_dict)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/init.py”, line 532, in call
return fn(*args, **newargs)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/widgets/form/save.py”, line 18, in savedocs
doc.save()
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 216, in save
self.run_post_save_methods()
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 449, in run_post_save_methods
self.run_method(“on_update”)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 412, in run_method
return Document.hook(fn)(self, *args, **kwargs)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 496, in composer
return composed(self, method, *args, **kwargs)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/model/document.py”, line 481, in runner
add_to_return_value(self, f(self, method, *args, **kwargs))
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/core/doctype/email_alert/email_alert.py”, line 58, in trigger_email_alerts
evaluate_alert(doc, alert, eevent)
File “/home/frappe/press/benches/1502261018/apps/frappe/frappe/core/doctype/email_alert/email_alert.py”, line 78, in evaluate_alert
if not eval(recipient.condition, context):
File “”, line 1
doc.workflow_state=‘Submit for Technical Approval’
^
SyntaxError: invalid syntax

The condition should be doc.workflow_state==‘Submit for Tec hnical Approval’