Error in Spyder: States variable is undefined, program still runs












0












$begingroup$


I recently received the following code to work with:



import seawater as sw
import matplotlib.pyplot as plt

def getPlotVars():
print("how many plots do you want to make?")
numPlots = input()
varName =
for i in range(int(numPlots)):
print("what variable do you want to plot against depth (Choose from: s, t, p, d) for plot number " + str(i+1) + "?")
varName.append(input())
return varName #return saves the result of the function to be utilized elsewhere


def plotVar(var, depths, figNum, xlabel):
plt.xlabel(xlabel, fontsize=15)
plt.ylabel("Depth (m)", fontsize=15)
plt.title(str(xlabel)+"vs Depth (m)", fontsize=20)
plt.gca().invert_yaxis()
plt.plot(var,z)
plt.show()


def main():
s = [26.1, 26.2, 26.6, 27.9, 28.2, 28.4, 28.9, 29.3, 30.0, 30.2] # salinities
t = [8.5, 7.8, 6.5, 6.4, 6.4, 6.4, 6.4, 6.4, 6.3, 6.1] # temps
z = [10, 32, 41, 50, 54, 64, 82, 100, 300, 500] # depths
p = sw.pres(z,45)
varList = getPlotVars()
print(varList)
if 's' in varList:
plotVar(s, z, 1, "Salinity (PSU) ")
if 't' in varList:
plotVar(t, z, 2, "Temperature (degC) ")
if 'p' in varList:
plotVar(p, z, 3, "Pressure (db) ")


You will notice in the plotVar function, the person who wrote this is attempting to plot using an undefined variable 'z'. However, all of this code executes with no errors in Spyder. In a different IDE (Enthought Canopy), an error occurs as expected.



Does anyone have any idea why this code runs?










share|improve this question







New contributor




Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$

















    0












    $begingroup$


    I recently received the following code to work with:



    import seawater as sw
    import matplotlib.pyplot as plt

    def getPlotVars():
    print("how many plots do you want to make?")
    numPlots = input()
    varName =
    for i in range(int(numPlots)):
    print("what variable do you want to plot against depth (Choose from: s, t, p, d) for plot number " + str(i+1) + "?")
    varName.append(input())
    return varName #return saves the result of the function to be utilized elsewhere


    def plotVar(var, depths, figNum, xlabel):
    plt.xlabel(xlabel, fontsize=15)
    plt.ylabel("Depth (m)", fontsize=15)
    plt.title(str(xlabel)+"vs Depth (m)", fontsize=20)
    plt.gca().invert_yaxis()
    plt.plot(var,z)
    plt.show()


    def main():
    s = [26.1, 26.2, 26.6, 27.9, 28.2, 28.4, 28.9, 29.3, 30.0, 30.2] # salinities
    t = [8.5, 7.8, 6.5, 6.4, 6.4, 6.4, 6.4, 6.4, 6.3, 6.1] # temps
    z = [10, 32, 41, 50, 54, 64, 82, 100, 300, 500] # depths
    p = sw.pres(z,45)
    varList = getPlotVars()
    print(varList)
    if 's' in varList:
    plotVar(s, z, 1, "Salinity (PSU) ")
    if 't' in varList:
    plotVar(t, z, 2, "Temperature (degC) ")
    if 'p' in varList:
    plotVar(p, z, 3, "Pressure (db) ")


    You will notice in the plotVar function, the person who wrote this is attempting to plot using an undefined variable 'z'. However, all of this code executes with no errors in Spyder. In a different IDE (Enthought Canopy), an error occurs as expected.



    Does anyone have any idea why this code runs?










    share|improve this question







    New contributor




    Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      0












      0








      0





      $begingroup$


      I recently received the following code to work with:



      import seawater as sw
      import matplotlib.pyplot as plt

      def getPlotVars():
      print("how many plots do you want to make?")
      numPlots = input()
      varName =
      for i in range(int(numPlots)):
      print("what variable do you want to plot against depth (Choose from: s, t, p, d) for plot number " + str(i+1) + "?")
      varName.append(input())
      return varName #return saves the result of the function to be utilized elsewhere


      def plotVar(var, depths, figNum, xlabel):
      plt.xlabel(xlabel, fontsize=15)
      plt.ylabel("Depth (m)", fontsize=15)
      plt.title(str(xlabel)+"vs Depth (m)", fontsize=20)
      plt.gca().invert_yaxis()
      plt.plot(var,z)
      plt.show()


      def main():
      s = [26.1, 26.2, 26.6, 27.9, 28.2, 28.4, 28.9, 29.3, 30.0, 30.2] # salinities
      t = [8.5, 7.8, 6.5, 6.4, 6.4, 6.4, 6.4, 6.4, 6.3, 6.1] # temps
      z = [10, 32, 41, 50, 54, 64, 82, 100, 300, 500] # depths
      p = sw.pres(z,45)
      varList = getPlotVars()
      print(varList)
      if 's' in varList:
      plotVar(s, z, 1, "Salinity (PSU) ")
      if 't' in varList:
      plotVar(t, z, 2, "Temperature (degC) ")
      if 'p' in varList:
      plotVar(p, z, 3, "Pressure (db) ")


      You will notice in the plotVar function, the person who wrote this is attempting to plot using an undefined variable 'z'. However, all of this code executes with no errors in Spyder. In a different IDE (Enthought Canopy), an error occurs as expected.



      Does anyone have any idea why this code runs?










      share|improve this question







      New contributor




      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      I recently received the following code to work with:



      import seawater as sw
      import matplotlib.pyplot as plt

      def getPlotVars():
      print("how many plots do you want to make?")
      numPlots = input()
      varName =
      for i in range(int(numPlots)):
      print("what variable do you want to plot against depth (Choose from: s, t, p, d) for plot number " + str(i+1) + "?")
      varName.append(input())
      return varName #return saves the result of the function to be utilized elsewhere


      def plotVar(var, depths, figNum, xlabel):
      plt.xlabel(xlabel, fontsize=15)
      plt.ylabel("Depth (m)", fontsize=15)
      plt.title(str(xlabel)+"vs Depth (m)", fontsize=20)
      plt.gca().invert_yaxis()
      plt.plot(var,z)
      plt.show()


      def main():
      s = [26.1, 26.2, 26.6, 27.9, 28.2, 28.4, 28.9, 29.3, 30.0, 30.2] # salinities
      t = [8.5, 7.8, 6.5, 6.4, 6.4, 6.4, 6.4, 6.4, 6.3, 6.1] # temps
      z = [10, 32, 41, 50, 54, 64, 82, 100, 300, 500] # depths
      p = sw.pres(z,45)
      varList = getPlotVars()
      print(varList)
      if 's' in varList:
      plotVar(s, z, 1, "Salinity (PSU) ")
      if 't' in varList:
      plotVar(t, z, 2, "Temperature (degC) ")
      if 'p' in varList:
      plotVar(p, z, 3, "Pressure (db) ")


      You will notice in the plotVar function, the person who wrote this is attempting to plot using an undefined variable 'z'. However, all of this code executes with no errors in Spyder. In a different IDE (Enthought Canopy), an error occurs as expected.



      Does anyone have any idea why this code runs?







      python anaconda






      share|improve this question







      New contributor




      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






      New contributor




      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 2 hours ago









      Patrick OldPatrick Old

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      New contributor




      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      New contributor





      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Patrick Old is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






















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