prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  move graphics.tsa to tsa.graphics
  Makes more sense to me to keep the tsa stuff under the tsa namespace. Might need to deprecate functions that aren't new. 
  
  
  </issue>
  <code>
  [start of statsmodels/tsa/api.py]
  1 from .ar_model import AR
  2 from .arima_model import ARMA, ARIMA
  3 import vector_ar as var
  4 from .vector_ar.var_model import VAR
  5 from .vector_ar.svar_model import SVAR
  6 from .vector_ar.dynamic import DynamicVAR
  7 import filters
  8 import tsatools
  9 from .tsatools import (add_trend, detrend, lagmat, lagmat2ds, add_lag)
  10 import interp
  11 import stattools
  12 from .stattools import *
  13 from .base import datetools
  14
  [end of statsmodels/tsa/api.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/statsmodels/tsa/api.py b/statsmodels/tsa/api.py
  --- a/statsmodels/tsa/api.py
  +++ b/statsmodels/tsa/api.py
  @@ -11,3 +11,4 @@
   import stattools
   from .stattools import *
   from .base import datetools
  +from ..graphics import tsaplots as graphics
  
verification_info: {"golden_diff": "diff --git a/statsmodels/tsa/api.py b/statsmodels/tsa/api.py\n--- a/statsmodels/tsa/api.py\n+++ b/statsmodels/tsa/api.py\n@@ -11,3 +11,4 @@\n import stattools\n from .stattools import *\n from .base import datetools\n+from ..graphics import tsaplots as graphics\n", "issue": "move graphics.tsa to tsa.graphics\nMakes more sense to me to keep the tsa stuff under the tsa namespace. Might need to deprecate functions that aren't new. \n\n", "before_files": [{"content": "from .ar_model import AR\nfrom .arima_model import ARMA, ARIMA\nimport vector_ar as var\nfrom .vector_ar.var_model import VAR\nfrom .vector_ar.svar_model import SVAR\nfrom .vector_ar.dynamic import DynamicVAR\nimport filters\nimport tsatools\nfrom .tsatools import (add_trend, detrend, lagmat, lagmat2ds, add_lag)\nimport interp\nimport stattools\nfrom .stattools import *\nfrom .base import datetools\n", "path": "statsmodels/tsa/api.py"}]}