我遇到了错误：
UnboundLocalError: local variable 't' referenced before assignment
当我执行公式t = t + tc时
在功能上。正如我先前在程序中定义的那样，这似乎没有多大意义：
#t(time) Axies
global t
t = 0
这是整个程序：
import timelines
#x(forward-back) Axies
global x
x = 0
#y(left-right) Axies
global y
y = 0
#z(up) Axies
global z
z = 0
#t(time) Axies
global t
t = 0
#u(universe) Axies
global u
u = 1
#how much time moves by per-turn, string
global time_change
time_change = 'doggos'
#the timeline, nets of exctinction
timelineList = 'Universal Development\nSolar Development\nPlanetary Development\nEvolution\nIntelligence\nContinental Drift\nSpeech\nReligion/Beliefs\nAgriculture\nTechnological Innovation\nSocial Politics\nCommunities\nCivilizations\nWar/Conflicts\nEconomy\nLaw\n----------------------------------------------'
global loop
global turn_action
global loop
def checkAction():
ca_loop = 1
while( ca_loop == 1 ):
if turn_action == 'timeline':
which_timeline = input("What timeline would you like to view?\n----------------------------------------------\n" + timelineList + "\n[Timelines]~| ")
if which_timeline == "Universal Development":
print(timelines.TimeUD)
ca_loop = 0
elif which_timeline == "Solar Development":
print(timelines.TimeSD)
ca_loop = 0
elif which_timeline == "Planetary Development":
print(timelines.TimePD)
ca_loop = 0
elif which_timeline == "Evolution":
print(timelines.TimeEv)
ca_loop = 0
elif which_timeline == "Intelligence":
print(timelines.TimeIn)
ca_loop = 0
elif which_timeline == "Continental Drift":
print(timelines.TimeCD)
ca_loop = 0
elif which_timeline == "Speech":
print(timelines.TimeSp)
ca_loop = 0
elif which_timeline == "Religion" or "Beliefs" or "Religion/Beliefs":
print(timelines.TimeRB)
ca_loop = 0
elif which_timeline == "Agriculture":
print(timelines.TimeAg)
ca_loop = 0
elif which_timeline == "Technological Innovation":
print(timelines.TimeTI)
ca_loop = 0
elif which_timeline == "Social Politics":
print(timelines.TimeSP)
ca_loop = 0
elif which_timeline == "Communities":
print(timelines.TimeCo)
ca_loop = 0
elif which_timeline == "Civilizations":
print(timelines.TimeCi)
ca_loop = 0
elif which_timeline == "War/Conflicts" or "War" or "Conflicts":
print(timelines.TimeWC)
ca_loop = 0
elif which_timeline == "Economics":
print(timelines.TimeEc)
ca_loop = 0
elif which_timeline == "Law" or "Justice System" or "Justice Systems" or "Justice System(s)" or "Law/Justice System(s)" or "Law/Justice Systems":
print(timelines.TimeLa)
ca_loop = 0
elif which_timeline == "doggos":
ca_loop = 0
else:
print("~|Improper Input|~\n")
which_timeline = "doggos"
elif turn_action == "finTurn":
continue
elif turn_action == "help":
print(timelines.Help)
ca_loop = 0
elif turn_action == "cont":
ca_loop = 0
print("blah")
else:
print("~|Improper Input|~")
def turn1( tc ):
t = t + tc
global turn_action
while ( loop == 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 ):
print("The current amount of " + time_change + "s is " + str(t))
turn_action = input("~| ")
checkAction()
print("\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n")
loopMenu = 1
while( loopMenu == 1 ):
yn = input("\t\t\t\t\t~|~~~~~~~~~~~~~~~~~~~~~~~~~~|~\n\t\t\t\t\tWelcome to Universe Simulation,\n\t\t\t\t\tthis is an interpretive program\n\t\t\t\t\tthat simulates a universe to a\n\t\t\t\t\tsmall scale. Do you wish to\n\t\t\t\t\tcontinue?\n\t\t\t\t\t\t\t")
if yn == "Yes":
print("\n~|Proceeding to Program...")
loopMenu = 0
elif yn == "No":
print("\n~|Closing Porgram...")
exit()
else:
print("\n~|Improper Input: Use Proper Capitalization // Yes or No only Applicable.|~\n")
loop_select = 1
while ( loop_select == 1 ):
loop = int(input("~|Choose a time-change per turn|~\n~|Applicable Forms of Input: 1 - Milisecond, 2 - Second, 3 - Minute,|~\n~|4 - Hour, 5 - Day, 6 - Month, 7 - Year , and 8 - Cosmic Second|~\n\n~| "))
if loop == 1:
print("The time-change is set to miliseconds.\n\n")
time_change = 'Milisecond'
loop_select = 0
elif loop == 2:
print("The time-change is set to seconds.\n\n")
time_change = 'Second'
loop_select = 0
elif loop == 3:
print("The time-change is set to minutes.\n\n")
time_change = 'Minute'
loop_select = 0
elif loop == 4:
print("The time-change is set to hours.\n\n")
time_change = 'Hour'
loop_select = 0
elif loop == 5:
print("The time-change is set to days.\n\n")
time_change = 'Day'
loop_select = 0
elif loop == 6:
print("The time-change is set to months.\n\n")
time_change = 'Month'
loop_select = 0
elif loop == 7:
print("The time-change is set to years.\n\n")
time_change = 'Year'
loop_select = 0
elif loop == 8:
print("The time-change is set to cosmic seconds.(a really long time)")
time_change = 'Cosmic Second'
loop_select = 0
else:
print("Input is currently inapplicable, try again.\n")
if loop == 1:
turn1( 0.1 )
elif loop == 2 or 3 or 4 or 5 or 6 or 7 or 8:
turn1( 1 )
答案 0 :(得分：1)
base R对每个函数有效-因此您必须在使用它的每个函数上将变量标记为subset(stack(places), grepl("cities", ind))
。